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Condonsinhaflumay27.doc

Chronicle of a Pandemic Foretold:
Lessons from the 2009 Influenza Epidemic
Available at SSRN: http://ssrn.com/abstract=1398445.
Executive Summary
The A(H1N1) influenza epidemic provided the first indication of the effectiveness of
the pandemic preparations that countries and international organizations initiated in the
wake of the 2003 SARS epidemic. In the case of SARS, China was criticized for not
reporting the outbreak quickly enough. This led to new reporting requirements under
WHO regulations. In the case of the 2009 influenza epidemic, Mexico and the United
States complied with their obligations to report outbreaks to the WHO as soon as they
detected a problem. Nevertheless, this reporting was delayed due to the timing of the
outbreak, which coincided with regular influenza season. The WHO declared a public
health emergency of international concern within 48 hours of laboratory confirmation
that the Mexican and US viruses were a new strain. While the WHO issued
recommendations against trade and travel restrictions, a significant number of countries
chose to ignore those recommendations. What was most worrying was the decision of
many countries to apply more severe restrictions against Mexico than against the United
States.
The initial lack of access to accurate testing equipment severely hampered Mexico’s ability to confirm quickly the cause of deaths and illness. Moreover, Mexico kept the world informed of every development in the epidemic with honesty and transparency, in accordance with WHO guidelines and regulations. Mexico also applied mitigation measures quickly, broadly and decisively. Mexico’s response to the outbreak led to the perception that Mexico’s epidemic was far worse than the US epidemic. While Mexico initially reported suspected cases on a daily basis, the United States limited its release of information to confirmed cases. This reinforced the perception that Mexico was much more seriously affected and the likely point of origin. Once Mexico had the capacity to test samples, it limited its release of information to confirmed cases, as the United States had done from the beginning. The response of many countries to Mexico’s open and transparent reporting in this case may undermine WHO reporting requirements and encourage countries to be
less open regarding future public health threats of international concern. Thus, the
response of some countries to Mexico’s exemplary handling of this situation may
increase the health risks to all people in future pandemics.
Keywords
Mexico; Swine flu; Influenza; A(H1N1); World Health Organization; Infectious
Disease Outbreaks; International Health Problems; Infectious Disease Reporting;
Communications Strategy; Economic Factors; World Trade Organization.
∗ The authors would like to acknowledge financial assistance from the Instituto Tecnológico Autónomo de México and the Asociación Mexicana de Cultura A.C. for their generous support of this research. We thank Marcello Basili, David Fidler, Stephen Heeney, Holger Hestermeyer, Atul Jain, Stephen Kay and Sajal Lahiri for their helpful comments on earlier drafts of this paper. We are solely responsible for the views expressed here and not the institutions we are associated with.
I. Introduction

The increasing frequency of global flu pandemics, together with the SARS outbreak of 2003, have highlighted the need to improve international coordination, share information and minimize the economic impact when such outbreaks occur. These concerns motivated the World Health Organization to adopt improved International Health Regulations (IHR, 2005) and to issue guidelines on communicating with the public during pandemics.1 In theory, reforms to the IHR (2005) enhance the ability of the WHO to coordinate and implement a global response to global diseases and future pandemics. The IHR (2005) rules, particularly those regarding trade restrictions, take into account in their design the relevant law of the World Trade Organization (WTO) regarding the use of trade restrictions to address public health concerns. The mutually reinforcing features of the IHR (2005) and WTO law have been well analyzed.2 The effectiveness of the IHR (2005), which entered into force in 2007, has been enhanced by the advent of modern communications technologies, which facilitate the dissemination of news on outbreaks of infectious diseases. Rapid detection of public health emergencies is a critical element of international disease prevention and control, but there are several potential obstacles to effective implementation of the IHR (2005), including legal, political and economic issues.3 In theory, WTO law, together with modern communications technologies, may create incentives for countries to report outbreaks of infectious diseases in order to reduce the risk of disproportionate trade restrictions in response to outbreaks of infectious diseases. However, these incentives depend on rapid and effective WHO recommendations that, together with WTO law, would minimize the risk of economic harm caused by disproportionate trade restrictions. The 2009 outbreak of swine flu demonstrated that even if WHO recommendations are issued relatively rapidly, they are unlikely to be effective in preventing the use of disproportionate trade and travel restrictions. Moreover, WTO law is unlikely to prevent states from taking measures whose appropriateness would only become clear with hindsight. Article 2 of the IHR (2005) establishes the purpose and scope of the Regulations in the following terms: “to prevent, protect against, control and provide a public health response to the international spread of disease in ways that are commensurate with and restricted to public health risks, and which avoid unnecessary interference with international traffic and trade”. The objective of avoiding unnecessary interference with international traffic and trade reflects the concerns of countries regarding the negative economic impact of disproportionate responses to public health risks that lack scientific justification. There have been many such cases. Following an outbreak of cholera in 1 Outbreak communication: Best practices for communicating with the public during an outbreak. Report of the WHO Expert Consultation on Outbreak Communications held in Singapore, 21–23 September 2004. 2 See for example John D. Blum, Law as Development: Reshaping the Global Legal Structures of Public Health, 12 Mich. St. J. Int'l L. 207 (2004); David Byrne, Is There a Lawyer in the House: The Law of Global Public Health, 33 J.L. Med. & Ethics 19 (2005); Emily Lee, The World Health Organization's Global Strategy on Diet, Physical Activity, and Health: Turning Strategy Into Action, 60 Food Drug L.J. 569 (2005); Timothy J. Miano, Understanding and Applying International Infectious Disease Law: U.N. Regulations During an H5N1 Avian Flu Epidemic, 6 Chi.-Kent J. Int'l & Comp. L. 26 (2006); and Jason Sapsin, International Trade Agreements: Vehicle for Better Public Health? 33 J.L. Med. & Ethics 111 (2005). 3 Fidler D. Influenza Virus Samples, International Law and Global Health Diplomacy. EID. 2008 14:1 88-94. Peru in 1991, even though the WHO and the US Centers for Disease Control found that there was no basis for travel or trade restrictions, the European Community and other countries imposed import bans on fish and other perishable foods, inspection requirements and restrictions on travelers from Peru. In 1994, after India reported a suspected outbreak of plague, even though the WHO had advised that no travel or trade restrictions were appropriate other countries canceled flights, closed borders to goods and people, and issued travel advisories.4 Such responses explain the past reluctance of countries to report public health threats. Member States had until June 2009 to assess their ability to comply with the core surveillance requirements of the IHR (2005) and to implement a plan for ensuring compliance. Reducing the risk of disproportionate trade restrictions would enhance economic incentives to comply with surveillance requirements. While the IHR (2005) contain norms that discourage the use of disproportionate trade restrictions in response to disease outbreaks, health-related trade restrictions are regulated by the WTO. WHO risk assessments and recommendations are likely to influence the application of WTO rules to such cases. However, how to ensure that the incentives created by the international legal system function effectively in regulating responses to outbreaks of infectious diseases remains an open question. This article is organized as follows. We first consider the problems that the IHR (2005) were meant to resolve, such as the need for rapid reporting of outbreaks, the
related need to minimize disproportionate travel and trade restrictions in response to
outbreaks and the need for international leadership to coordinate the global response.
We then analyze how the IHR (2005) are designed to achieve this end and how effective
a tool the IHR (2005) proved to be during the 2009 outbreak of swine flu. We also
consider the WHO guidelines for communicating with the public during a pandemic and
assess the effectiveness of the Mexican government’s pandemic planning and
communication strategy in addressing the swine flu epidemic. We also consider the role
of WTO law in regulating the use of disproportionate trade restrictions in response to
disease outbreaks, as well as regulating the use of compulsory licenses to lower the cost
of stockpiling antiviral medications in preparation for a pandemic. In Appendix A, we
provide a daily narrative of the unfolding saga of the 2009 outbreak of A (H1N1) virus.
Unlike the story of Gabriel García Márquez, our narrative is strictly linear.
The Threat of Global Pandemics
In the summer of 2007, researchers from the University of Washington confirmed for the first time that the H5N1 influenza virus had been transmitted from human to human. A woman on the Indonesian island of Sumatra caught the virus from poultry in May of 2006 and transmitted the virus to her 10-year-old nephew, which was then transmitted to other relatives. Seven of eight family members who caught the disease died. This incident showed that there is a serious threat of an H5N1 influenza pandemic that could spread quickly and have a high and rapid mortality rate.5 Human-to-human transmission of the H5N1 influenza virus was also suspected in Pakistan in November 2007. These events left the world expecting the next influenza pandemic to emerge from Asia, based on the H5N1 influenza virus. Mexico’s five phases of pandemic alert, shown in Table 1, illustrate this point. 4 von Tigerstrom B. The Revised International Health Regulations and Restraint of National Health Measures. Health Law Journal. 2005 13:35. 5 Waters J (2007) Bird flu could have become worldwide pandemic: study. http://www.abc.net.au/news/stories/2007/08/31/2021231.htm. Accessed 31 August 2007. Table 1: Mexico’s five phases of pandemic alert
Source: http://www.dgepi.salud.gob.mx/pandemia/influenza-diagrama.htm The Mexican system of pandemic alert proved unusable during the swine flu epidemic and remained at level 1 well into the epidemic.6 The WHO uses six phases of pandemic alert to estimate the level of a threat (see Table 2). At the beginning of the swine flu epidemic, it was in phase 3 (predominantly animal infections with few human infections), because H5N1 was a new influenza virus subtype that is causing disease in humans, but was not yet spreading efficiently and sustainably among humans. On April 27, the WHO raised the pandemic alert level to 4 (sustained human-to- human transmission) and on April 29 to level 5 (human-to-human spread of the virus into at least two countries in one WHO region). The swine flu epidemic drove home the point that there is no way of knowing when a pandemic might occur or where it might originate. The six-point system was created in 2005 when the threat was H5N1 avian flu, which has a high fatality rate, and does not take into account a virus’s lethality. Following the Sixty-second World Health Assembly meeting 18-22 May 2009, the WHO announced that it would amend its pandemic alert rules to include a criterion of “substantial risk of harm to people,” not just the geographic spread. This would mean that the A (H1N1) virus would not reach level six as long as it remained a relatively benign virus. This change was in response to the complaints of some countries that the warning system created panic and pressure for border closings, even though the A (H1N1) virus was far less deadly than H5N1 avian flu. This change highlights the need to be careful about designing pandemic rules based on what may prove to be incorrect assumptions regarding the source of the next pandemic. Both the WHO and Mexico designed their pandemic alert systems based on the assumption that it would be used to address H5N1 avian flu. 6 As of 28 April 2009, the alert level on the web page remained at 1, well after the Mexican government introduced emergency measures and after the WHO raised its alert level to 4. The peak of the number of cases took place on April 26, 2009. Table 2: Phases of the World Health Organization (WHO)
Phase Level
In nature, influenza viruses circulate continuously among animals, especially birds. No viruses circulating among animals have been reported to cause infections in humans. An animal influenza virus circulating among domesticated or wild animals is known to have caused infection in humans, and is therefore considered a potential pandemic threat. An animal or human-animal influenza virus has caused sporadic cases or small clusters of disease in people, but has not resulted in human-to-human transmission sufficient to sustain community- level outbreaks. Limited human-to-human transmission possible. Verified human-to-human transmission of an animal or human-animal influenza virus able to cause "community- level outbreaks." The ability to cause sustained disease outbreaks in a community marks a significant upwards shift in the risk for a pandemic. Indicates a significant increase in risk of a pandemic but does not necessarily mean that a pandemic is a forgone conclusion. Human-to-human spread of the virus into at least two countries in one WHO region. Phase 5 is a strong signal that a pandemic is imminent and that the time to finalize the organization, communication, and implementation of the planned mitigation measures is short. The pandemic phase, characterized by community level outbreaks in at least one other country in a different WHO region in addition to the criteria defined in Phase 5. Indicates a global pandemic underway. Pandemic disease levels in most countries with adequate surveillance drop below peak observed levels. Pandemic activity appears to be decreasing, but additional waves of the disease possible. Previous pandemics have been characterized by waves of activity spread over months. Influenza disease activity returns to levels normally seen for seasonal influenza. Maintain surveillance and update pandemic preparedness and response plans accordingly. An intensive phase of recovery and evaluation may be required. Source: http://www.who.int/csr/disease/avian_influenza/phase/en/index.html Figure 1 shows how often recorded influenza epidemics occurred during the second millennium and how they have increased in frequency over time. This pattern is
not surprising because fast- moving pandemics require close contact between groups of
people. Over time, people began living together in bigger groups in cities. They also
increased interactions due to faster modes of transportation. These two factors played an
important role in the spread of the 2009 swine flu epidemic, the first within Mexico City
and the second from Mexico to the rest of the world. Mexico City became the hub the
same way Hong Kong became the hub for the propagation of SARS in 2003. Unlike
SARS, this 2009 outbreak is a close relative of the Spanish Flu of 1918-1919 that was
the first true global pandemic.
Insert Figure 1 here.

The 1918-1919 global flu pandemic caused 50 million deaths.7 The 1918-1919 influenza virus had a mortality rate of 2.5%, significantly higher than previous influenza
epidemics, which were less than 0.1%.8 Moreover, unlike other flu pandemics, almost
half of the influenza-related deaths were in young adults, 20–40 years of age (see Figure
2).9 While both male and young adults died in excess, the virus hit younger men harder.
In this regard, the 1918-1919 virus was like HIV/AIDS, which also affected young
adults in the most productive years of their lives and has a correspondingly greater
economic impact.
Insert Figure 2 here.

Both the 2009 swine flu epidemic and the Spanish Flu epidemic have one important common element—they both affected (mostly) adults. They did not affect primarily the young and the old with weak immune systems, as had happened in the case of other epidemics like the plague in the fourteenth century. If the excess deaths occur mainly among the very young and the very old, the economic implications are different, since the young have not accumulated much human capital and society has not spent many resources on them yet. Similarly, if the very old die, they do not affect production in a society. However, when adults die in the prime of their productive years, it reduces economic growth significantly. It is still unclear why the Spanish Flu affected the most able-bodied persons at a higher rate. One plausible hypothesis is that the flu itself was not the cause of their deaths. Rather, the virus produced a reaction that caused the patients’ own organs to attack the body. Since able-bodied persons have the most vigorous organs, they were affected the most. It is also important to remember that the Spanish Flu was not identified as flu until more than a decade later. Thus, most of what we know today about the Spanish Flu is the result of postmortem analysis of the disease. In the case of the Spanish Flu, the impact was swift. Everything happened within a span of three years. The 1918-1919 influenza virus spread along trade routes and
shipping lines, along with the frontlines of World War I.10 A century later, trade routes
have increased dramatically, as have the means for transporting humans around the
globe. Figure 3 shows the dramatic increase in international passengers and reduction in
the time it takes to circumnavigate the globe in commercial vehicles. These factors
raised concerns that a new influenza pandemic could unfold much more rapidly and
cause many more deaths than the 1918-1919 pandemic.
Insert Figure 3 here.

In the face of the challenges posed by pandemics in the 21st century, the hope was that the evolution of science and international institutions over the past century would be mitigating factors that could help to contain the effects of a fast- moving global pandemic. However, as the experience with severe acute respiratory syndrome (SARS) showed, modern air travel means that contagious diseases can spread rapidly 7 Taubenberger JK, Morens DM (2006) 1918 influenza: the mother of all pandemics. Emerging Infectious Diseases. http://www.cdc.gov/ncidod/EID/vol12no01/05-0979.htm. Accessed 23 October 2007. 8 Taubenberger JK, Morens DM (2006). Billings M (1997) The Influenza Pandemic of 1918. http://virus.stanford.edu/uda/. 9 Taubenberger JK, Morens DM (2006). 10 Billings (1997). around the globe (see Figure 4). Even with modern antiviral and antibacterial drugs,
vaccines, and prevention knowledge, the return of a pandemic virus equivalent to the
virus of 1918-1919 would probably kill more than 100 million people worldwide, and a
pandemic virus with the pathogenic potential of the H5N1 virus could cause
substantially more deaths.11
Insert Figure 4 here.

The Economics of SARS
On April 30, Mexico’s Secretary of Finance declared that the impact of the virus on the Mexican economy would be in the order of magnitude of 0.3 to 0.5 percent of the Gross Domestic Product (GDP).12 Such estimates come straight out of the experience of SARS. SARS provides a glimpse into a set of policy responses from policymakers in the developed world. It jolted them to take many unprecedented steps, after an initial lack of response. SARS emerged in southern China in November 2002. It spread rapidly along international air routes in early 2003, as far away as Canada. Asian countries had the most cases (7,782) and deaths (729). SARS challenged Asian health care systems, disrupted Asian economies and tested the effectiveness of the International Health Regulations of the World Health Organization (WHO). Worldwide, there were 8,437 people infected and 813 deaths. Outside Asia, the country most affected by SARS was Canada. There were 250 infected people in Canada, resulting in 38 deaths. The WHO implemented extensive actions to respond to SARS. Its response was delayed by an initial lack of cooperation from officials in China. The WHO activated its global infectious disease network. It deployed public health specialists to affected areas in Asia to provide technical assistance. The WHO also established international teams to identify the cause of SARS and to provide guidance for managing the outbreak. Its ability to respond to SARS in Asia was limited by its authority under the existing International Health Regulations. Asian gove rnments initially struggled to recognize the SARS emergency and to organize an appropriate response. They ultimately established control once the very negative economic impact SARS produced became clear. Their initial response was hindered by a number of problems: (1) poor communication; (2) ineffective leadership; (3) inadequate disease surveillance systems; and (4) insufficient public health capacity. Improved screening, rapid isolation of suspected cases, enhanced hospital infection control, and quarantine of close contacts ultimately helped to end the outbreak. The SARS outbreak added impetus to the process of revising the International Health Regulations (IHR). The WHO and its member states have since expanded the scope of required disease reporting to include all public health emergencies of international concern and devised a system for better cooperation with WHO and other countries. It has also setup an emergency response system. The SARS crisis temporarily dampened consumer confidence in Asia, costing Asian economies USD 11 to 18 billion. SARS had significant, but temporary, negative impacts on a variety of economic activities, especially travel, tourism and manufacturing. The estimated impact of the short term effects of SARS can be split into three broad categories: the demand side effect, the effect of rising cost and the country risk 11 Taubenberger and Morens (2006). 12 http://www.bloomberg.com/apps/news?pid=20601086&sid=aJPzRD.u3qjY&refer=latin_America. A week after that, the Foreign Secretariat of Mexico raised the impact to 1 percent of GDP. Given the experience of SARS, this seems unusually high. effect. Lee and McKibbin (2003)13 estimated the impact. Their model is a general equilibrium model that has the virtue of taking into account compensatory effects. For example, if tourists shun Hong Kong as the preferred destination, they might go to Maldives, thereby compensating one country’s loss by another country’s gain. Not surprisingly, Hong Kong suffered the biggest loss (see Table 3). There have been a number of single country studies as well. For example, Darby (2003)14 examines the case of Canada and concludes that Canadian losses amounted to
1.5 billion Canadian dollars or 0.15 percent of Canadian GDP, with the Toronto area
being the hardest hit.

Table 3: Te mporary Shock of SARS as a Percentage of GDP

Source: G-Cubed (Asia Pacific) Model version 50n. Lee JW, McKibbin W (2003 ) Globalization and Disease: The Case of SARS. Working Paper No. 2003/16, Australian National University (see also Darby, 2003). The entire episode of SARS lasted just a few weeks. It did not kill many people. Yet the negative economic impact was sharp and swift. This episode and the subsequent bird flu outbreaks in different parts of the world prompted the Congressional Budget Office to produce a potential impact study. It considered two scenarios: Mild (where 25 percent of the population is affected but not seriously ill, with 1.4 percent fatality) and Severe (where 30 percent of the population is affected and a third of them are seriously ill, with 2.5 percent fatality). They estimated that the supply side impact of a potential 13 Lee JW, McKibbin W (2003 ) Globalization and Disease: The Case of SARS. Working Paper No. 2003/16, Australian National University 14 Darby P (2003) The Economic Impact of SARS. The Conference Board of Canada pandemic on GDP would be about 4.25 percent in the severe scenario and about 1
percent in the mild scenario (Congressional Budget Office, 2006)15.

Globalization, Climate Change and Pandemics

Globalization, together with global climate change, also means that diseases that were formally confined to tropical developing countries are now spreading to temperate developed countries. This is occurring through a combination of vector migration—the movement of mosquitoes from the tropics to temperate regions—and human travel. West Nile virus, which is transmitted by mosquitoes, is now found throughout the continental United States and Canadian provinces. Chikungunya, a tropical disease that is related to dengue fever, is normally found in the Indian Ocean region. However, in the summer of 2007, a chikungunya epidemic occurred in northern Italy, where tiger mosquitoes now can thrive in the warming climate of southern Europe. An Italian, who had traveled to Kerala, India, returned to Italy with chikungunya in his blood, where it was spread by the tiger mosquitoes. This was the first epidemic of a tropical disease in a developed, European country in modern times (Rosenthal 2007).16 The movement of developing country diseases to developed countries provides another reason to view developing country diseases, which have been largely neglected, as a global problem that requires a global response. Infectious diseases can also originate in developed countries. In November 2007, a new and virulent strain of adenovirus was reported in parts of the United States. The US Centers for Disease Control and Prevention (CDC) reported that two of the ten people who died from the new strain were infants and 50 of the 140 affected people were hospitalized, including 24 admitted to intensive care units. The new strain of adenovirus first appeared in May 2006 in New York, and spread to Oregon, Washington state and Texas. This particular adenovirus can make healthy young adults severely ill, which is unusual for an adenovirus.17 Understanding past outbreaks of diseases can lead to new public health measures and other interventions to more effectively address existing diseases and to better prepare the world for the future diseases. Sherman has examined how several diseases have influenced society, politics and culture and spawned new ways to address diseases and their consequences: (1) porphyria and hemophilia, which affected the royal families of Europe, influenced the political fortunes of England, Germany, Russia and the United States; (2) late blight, which caused the Irish potato famine in the 1850s, led to a wave of immigration that changed the politics of the United States; (3) cholera, which prompted sanitary measures, promoted nursing and led to the discovery of oral rehydration therapy; (4) smallpox led to a vaccine that eradicated the disease; (5) bubonic pla gue, which caused the “Black Death” in the fourteenth century, promoted quarantine measures; (6) syphilis led to a cure through chemotherapy; (7) tuberculosis led to attenuated vaccines; (8) malaria and yellow fever provided the basis for vector control; and (9) influenza and HIV/AIDS, two pandemics that continue to challenge humanity. 18 15 Congressional Budget Office (2006) A Potential Influenza Pandemic: Possible Macroeconomic Effects and Policy Issues. Washington 16 Rosenthal E (2007) As Earth Warms Up, Tropical Virus Moves to Italy. http://www.nytimes.com/2007/12/23/world/europe/23virus.html?hp. Accessed 23 December 2007. 17 Dunham W (2007) Virulent form of cold virus spreads in U.S. Reuters, 15 November 2007. 18 Sherman IW (2007) Twelve Diseases That Changed Our World. American Society for Microbiology Press. As we will discuss below, the 2009 A(H1N1) epidemic demonstrates the importance of close technical cooperation with developing countries such as Mexico in order to facilitate rapid responses to diseases that are neither limited to developing nor developed countries. It also demonstrates the importance of financial assistance, where needed, as an investment in preventing or mitigating the consequences of pandemics in both dono r and recipient countries. International Health Regulations and Disease Surveillance
An important objective of the WHO’s regulatory powers is to harmonize national behavior through international standards based on scientific and public health principles.19 The 1969 International Health Regulations (IHR (1969)), which focused on relatively passive notification and control measures for cholera, plague, yellow fever and smallpox, were ineffective with respect to more recent global public health crises, includ ing HIV/AIDS, SARS and the threat of an influenza pandemic. The IHR (1969) also limited the WHO’s ability to respond to new outbreaks of disease by requiring the WHO to rely on official state notifications, rather than other sources. WHO member states often did not comply with the IHR (1969), failing to notify the WHO of cases of diseases and applying excessive health measures beyond those permitted by the IHR (1969).20 The risk of economic losses due to disproportionate trade and travel restrictions created a disincentive to report outbreaks of infectious diseases. The IHR (2005) introduced a new surveillance system for all diseases and health events that may constitute a “public health emergency of international concern”. 21 The IHR (2005) expand disease coverage, notification requirements, and the sources of information that the WHO can use regarding disease outbreaks. The IHR (2005) also set standards for public health responses to the international spread of disease, but leave States with considerable discretion regarding their implementation at the national level. The central obligation of countries is to report outbreaks of disease, broadly defined, to the WHO. Article 6 of the IHR (2005) requires States to notify the WHO of all events which may constitute a public health emergency of international concern within its territory and any health measure that has been implemented in response to those events. In making its recommendations, Article 9 allows the WHO to take into account reports from sources other than notifications or consultations from the affected State. Given modern communication technologies, countries now have an incentive to report disease outbreaks to the WHO, in order to ensure the accuracy of the report. Modern communication technologies (mobile telephones, email and internet) make it difficult for countries to suppress information regarding outbreaks of contagious diseases. Once the existence of an outbreak becomes known, the level of the public health risk and the effectiveness of the affected country’s response influence the responses of other countries (trade and travel restrictions) and the economic consequences of those responses. However, the 2009 swine flu outbreak demonstrates that the suppression of information is not the only issue that influences how rapidly disease outbreaks are reported. The outbreak must also be detected quickly. Mexico reported the disease 19 Fidler D. The Future of the World Health Organization: What Role for International Law? Vanderbilt Journal of Transnational Law. 1998 31:1079. 20 von Tigerstrom B. The Revised International Health Regulations and Restraint of National Health Measures. Health Law Journal. 2005 13:35. 21 International Health Regulations (2005), WHA58.3, Fifty-Eighth World Health Assembly, http://www.who.int/gb/ebwha/pdf_files/WHA58/WHA58_3-en.pdf. outbreak quickly, once it became aware that it was not dealing with ordinary seasonal influenza. However, it later became apparent that the A (H1N1) influenza epidemic probably had begun much earlier. At the time, health officials mistook it for seasonal influenza, since it coincided with the normal influenza season and was relatively mild. The IHR (2005) establishes an Emergency Committee to give the Director General its views on the existence and termination of a public health emergency of international concern and on any proposed temporary recommendations. Once the Director General determines that a public health emergency of international concern exists, the Director General can issue temporary recommendations regarding measures to be taken by the affected State or other States to prevent or reduce the international spread of disease and avoid unnecessary interference with international traffic. Article 17 requires that health measures recommended by the Director General be determined on the basis of a risk assessment appropriate to the circumstances, not be more restrictive of international traffic and trade and not more intrusive to persons than reasonably available alternatives that would achieve the “appropriate” level of health protection. 22 Two related issues arise regarding the effectiveness of the WHO Director General’s authority to issue recommendations. How likely is it that the WHO Director
General will issue recommendations and how likely is it that those recommendations
will be followed? Before the A (H1N1) influenza outbreak, some commentators
believed that even if the WHO Director General were to declare a public health
emergency of international concern and issue recommendations, the affected country
may have been unwilling to accept those recommendations and would seek to negotiate
a compromise, as happened in Canada’s case with SARS.23 However, some predictions
based on the experience with SARS proved to be wrong when the swine flu outbreak
became known to the world, underlining the unpredictable nature of epidemics.
Mexico’s Pandemic Preparations
Mexico was prepared for an influenza pandemic well in advance.24 Studies of earlier pandemics convinced the Mexican government that the benefits of pandemic planning exceeded the costs. It implemented its plan almost to the letter when the new virus was confirmed on April 23. 22 The language of Article 17 echoes some of the legal criteria applied in WTO law to trade-restrictive health measures in order to determine whether they can be justified under the general exceptions of GATT Article XX (b) or permitted under the Agreement on Sanitary and Phytosanitary Measures or the Agreement on Technical Barriers to Trade. However, under GATT countries remain free to select their level of health protection and can select a zero tolerance approach. This wording seems to suggest that at the WHO level the recommendations of the DG depart from a mere “appropriate” level of protection (whatever that may be). 23 Jonathan E. Suk, Sound Science and the New International Health Regulations, Global Health Governance, Volume 1, No. 2 (Fall 2007) http://www.ghgj.org. 24 Mexico passed legislation in July 2006 that mandated the creation of a National Plan for Preparation and Response to an Influenza Pandemic (Plan Nacional de Preparación y Respuesta ante una Pandemia de Influenza) and a National Committee on Health Security (Comité Nacional para la Seguridad en Salud) and made the plan mandatory for all levels of the national healthcare system. See ACUERDO DEL CONSEJO DE SALUBRIDAD GENERAL POR EL QUE SE ESTABLECEN LAS ACTIVIDADES DE PREPARACIÓN Y RESPUESTA ANTE UNA PANDEMIA DE INFLUENZA, DOF, 19 July 2006. The National Plan was published in August 2006. See Plan Nacional de Preparación y Respuesta ante una Pandemia de Influenza, http://www.fao.org/docs/eims/upload//221482/national_plan_ai_mex_es.pdf, consulted 1 May 2009. The plan sets out general guidelines for the preparation for and response to an influenza pandemic in order to mitigate the impact of an influenza pandemic in Mexico. The Mexican government also prepared a Guide for the Preparation of Institutions for an Influenza Pandemic (GUÍA PARA LA PREPARACIÓN DE INSTITUCIONES ANTE UNA PANDEMIA DE INFLUENZA). Mexico is the only developing country member of the Global Health Security Action Group, a public health communications network whose other members are Canada, Japan, the United States and several European countries.25 Criticism regarding the Mexican government’s response ignores the complexity of recognizing and responding to an unexpected public health emergency. 26 The Mexican government knew that a flu pandemic could infect 25-35% of population. A model based on past pandemics predicted the following probable impact of a worst-case-scenario pandemic in Mexico, assuming a duration of eight weeks peaking in the fifth week, 25% of population infected and 17% with a high risk of complications: 21,522-117,461 deaths; 80,727-352,513 hospitalizations; 11,798,789- 20,710,591 medical consultations; 278% use of hospital capacity in the first week and 912% in the fifth week; 58% use of ventilator capacity in the first week and 269% in the fifth; 9,084.7 million MXN (672.9 million USD at 13.5) in direct costs and 148,853.8 million MXN (11,026.2 million USD) in indirect costs (1.6% of annual GDP).27 The Mexican government took this public health risk very seriously. Mexico’s pandemic preparation plan envisaged three types of measures. First, medical interventions would focus on antiviral medication, vaccines, medical attention and personal protection equipment (e.g., gloves and masks).28 In this category, Mexico stockpiled antiviral medications in advance, provided medical attention regardless of the healthcare coverage of the individual and distributed surgical masks when the outbreak occurred. However, Mexico’s stockpile antiviral medications in the first week of the outbreak was only 1.4 million courses of treatment, enough for only 1.3% of the population. Vaccination was not an option initially, except for seasonal flu, since it would take several months to manufacture a vaccine for A(H1N1). Moreover, when the epidemic struck, Mexico was still in the process of expanding its vaccine manufacturing capacity, which was scheduled for completion in 2011.29 Second, non-medical interventions would focus on personal hygiene (e.g. hand-washing), travel restrictions, quarantine, social distancing (e.g. school closures) and communication of risks.30 In this regard, the Mexican government advised people on person hygiene measures in public announcements (including in President Calderon’s press conferences), progressively implemented social distancing (moving from school closures to cancellation of public events to shutting down all non-essential services and advising people to avoid crowded, enclosed places) and followed the WHO guidelines for communicating with the public during an outbreak. The government did not impose travel restrictions or quarantine, due to the determination of both the CDC and WHO that containment was not feasible and that efforts should focus on mitigation. Third, the maintenance of social and economic systems would prioritize security and legislation, water and food supplies, energy supplies, transportation, telecommunications and financial services.31 When the government shut down non-essential services from May 1-5, these areas were not only left operating, but had their hours expanded. These measures aim to delay the 25 http://www.ghsi.ca/english/background.asp 26 Julio Frenk, “Mexico’s Fast Diagnosis”, www.nytimes.com, 30 April 2009. 27 P. Kuri, Mexican Ministry of Health, PREPARACIÓN PARA LA RESPUESTA ANTE UNA PANDEMIA DE INFLUENZA, Presentation to ITAM Faculty Meeting, 29 November 2007. 28 Ibid. 29 In 2008 the Mexican government announced the acquisition of a manufacturing plant that would have the capacity to manufacture 20 million vaccine doses annually and signed an agreement with Sanofi Aventis to produce vaccines in Mexico in conjunction with state-owned Laboratorios de Biológicos y Reactivos de México, SA de CV (Birmex). El Universal, 30 April 2009. 30 Ibid. 31 Ibid. peak in the epidemic, thereby reducing the number of cases and the burden on
healthcare services that would otherwise occur (see Figure 5).32 Those who question the
Mexican response understand it quickly when this point is made.
Insert Figure 5 here.

Many members of the public were puzzled and alarmed by the dramatic measures implemented by Mexico in response to the epidemic, both in Mexico and abroad. Experts in pandemic response were not. Indeed, the Director General of the WHO repeatedly praised the Mexican government for its response to the epidemic. This dramatic response had been planned for several years. Mexico’s pandemic preparations and its response to H1N1 were based on cutting edge intelligence and close cooperation with the world’s most advanced economies, particularly Canada and the United States. Nevertheless, there were gaps in Mexico’s pandemic preparation. Insufficient supplies of masks, gloves and gowns meant that Mexico required donations from other countries, such as China and Japan. Insufficient testing equipment forced Mexico to report suspected cases when the US was reporting confirmed cases, which gave the initial impression that the situation was far worse in Mexico than it was. Mexico’s stockpile of antiviral medicine, while sufficient for this outbreak, was far below what its needs could have been in a more serious situation. This may have been a factor in Mexico’s decision to respond as aggressively as it did with mitigation measures. Had the government not delayed the peak as effectively as it did, Mexico could have had far more cases. In that event, its supply of antiviral medicine probably would have been inadequate and further supplies could have been difficult to acquire. In addition, Mexico’s capacity to manufacture vaccine is insufficient. While the expansion of this capacity was part of Mexico’s pandemic preparation, it appears that it will arrive too late for this epidemic. There was a lack of coordination between different levels of government, most notably the Mexico City and federal governments, both of which gave daily news
conferences regarding the latest influenza statistics in their respective jurisdictions.
Different political parties occupy the Mexico City government (PRD) and presidency
(PAN) and this appeared to generate competition over public perceptions regarding who
was doing the best job of addressing the crisis. This lack of coordination was possibly
linked to the upcoming elections for Congress in July 2009 and for president in 2012.
Party politics need to be set aside in an emergency and the government needs to speak
with one voice. Pandemic planning should set these rules in advance. Finally, like the
rest of the world, Mexico assumed that the epidemic would start in Asia. This
assumption turned out to be wrong. Pandemic planning should assume that a pandemic
could start anywhere.
The Swine Flu Outbreak Tests Pandemic Preparations

The swine flu outbreak provided the first test for the IHR and the WHO. The WHO’s response was better than some experts had predicted. However, the outbreak still revealed cracks in national and international pandemic preparations. The influenza diary in Appendix A summarizes the manner in which this epidemic unfolded.33 32 Interim Pre-pandemic Planning Guidance: Community Strategy for Pandemic Influenza Mitigation, CDC, Feb 2007. 33 Sources: various news media from Mexico (El Financiero, El Universal, Milenio), US (Wall Street Journal, New York Times, LA Times, Washington Post, ABC, American Press), Canada (Globe and Several key facts emerge from the diary and provide a first indication of the effectiveness of the IHR (2005) and Mexico’s response. It is important to note that the daily reports of total confirmed cases and deaths vary depending on the source. For example, Mexico has provided two daily updates whereas the CDC has provided only one daily update. The WHO also provides only one daily update, which is usually one day behind the latest figures. For this reason, there often appear to be discrepancies in the figures. This is reflected in the differences between some of the figures for the same day in the daily diary as well as apparent discrepancies in the numbers we use in Table 4 and Figure 7. First, Mexico complied with its obligation to report its outbreaks to the WHO. This suggests an understanding of the incentives to report outbreaks. Second, Mexico’s delays in reporting what later turned out to be cases of A(H1N1) appear to be due to insufficient technical expertise or equipment combined
with the timing of the outbreak, rather than a desire to hide the outbreak. Figure 6 shows
when the swine flu outbreak occurred in relation to the regular flu season in Mexico.
The weekly trend did have an unusual peak in late April. But, this peak was nowhere
near the peak that occurred in January 2009. Even with the peak, the level was lower
than what took place in November 2008. Thus, there is no evidence that the Mexican
Government delayed any reporting. On the contrary, it reported on the basis of
suspected cases even before they were confirmed.
Insert Figure 6 here.

This might suggest that the obligation to report outbreaks may prove ineffective in the absence of adequate technical expertise and equipment. However, the United States also experienced delays, even though its earliest cases appear to have occurred around the same time as Mexico’s earliest cases (see Appendix A). Thus, it is possible that some outbreaks may be difficult to detect or their seriousness may be difficult to confirm as quickly as we would like, regardless of the level of technical expertise and equipment. It may be that the timing of the outbreak and the nature of the virus were the primary cause of any delays. Third, the WHO DG did declare a public health emergency of international concern, within 48 hours of laboratory confirmation that the Mexican virus was new and that it was the same as the US virus. While some might like to see a fa ster response, this contradicts prior speculation that the WHO DG would be unwilling to make such a declaration. Fourth, two days after the declaration, the WHO raised the alert level to 4 and issued recommendations, before raising it to level 5 two days later. Again, while some might like to see a faster response, this contradicts prior speculation that the WHO DG would be unwilling to issue recommendations. After the declaration of alert level 5, there was speculation as to whether the WHO would raise the alert to the highest possible level of 6. That level never materialized. Fifth, a significant number of countries—from different parts of the world and with varying levels of economic development—chose to ignore the WHO DG’s recommendations in introducing trade and travel restrictions. In contrast to the reporting Mail, Canadian Press), Britain (Financial Times, Guardian, Independent, BBC, Economist), Asia (China Post) as well as WHO and CDC web sites, Morbidity and Mortality Weekly Report (http://www.cdc.gov/mmwr), Emerging Infectious Diseases (http://www.cdc.gov/eid), FluView Weekly Influenza Surveillance Report (http://www.cdc.gov/flu/weekly/), Center for Infectious Disease Research and Policy (www.cidrap.umn.edu), WTO News and WHO and Mexican government news conferences. Confirmed (suspected) cases versus travel and trade restrictions
Confirmed
Travel Measures
Trade Measures
(suspected)
Brazil, Chile, Peru, Colombia, Ecuador, Guatemala, Nicaragua, El Salvador and Panama begin sanitary controls on arrivals from Mexico. Japan starts screening arrivals from Mexico for fever. Argentina, Costa Rica, Dominican Republic and Honduras begin sanitary controls on arrivals from Mexico. US begins “passive surveillance” on arrivals from Mexico. China, Russia set up quarantines. Hong Kong advises residents not to travel to Mexico. Malaysia, South Korea and Japan check airport passengers for signs of illness. CDC recommends Americans forgo “nonessential travel” to Mexico. EU health minister urges Europeans to avoid nonessential travel to the US or Mexico, but later denies she Indonesia, Lebanon ban pork imports from Canada, Mexico and US. Britain, Canada, France, Germany, Switzerland advise against nonessential travel to Mexico. Australia recommends citizens who travel to Canada consult a doctor if symptoms develop. India and Malaysia warn citizens to restrict travel to Mexico, Canada and the US. Japan requires Mexicans to obtain visas before arrival; sets up quarantine for suspected cases. Britain t ells citizens in Mexico to consider leaving. Cuba and Argentina suspend flights to Mexico for 48 hours. Air Canada, Westjet and Transat suspend flights to Mexican beach resorts. Ecuador, Peru suspends flights with Mexico. French health minister calls for suspension of flights from EU to Mexico. Five cruise lines stop all port calls in Mexico. EU rejects French proposal to suspend flights with Mexico. Taiwan issues a red alert for citizens not to travel to Mexico, Hong Kong quarantines hotel. China suspends flights from Mexico to Shanghai. Nestlé bans all non-essential travel by its Chinese health authorities find and place under quarantine 164 of the 189 passengers and crew members aboard a flight from pork from Mexico, US, France, Canada, Israel, Spain and New Zealand. China is still holding Mexicans in quarantine. Argentina says it suspended flights with Mexico because of its seasonal influenza and dengue fever outbreaks. China quarantines 25 Canadian students, 2 US citizens, increases reported infections. Russia extends its pork import ban to Canada and Spain, but lifts the ban for some US states. Mexico sends plane to get Mexicans quarantined by China. China sends a plane to get Chinese stranded to Mexico. China has quarantined Canadians and Mexicans based on nationality. Singapore orders a seven-day quarantine for all passengers arriving from Mexico, Canada and US. Notes: The numbers of confirmed cases are based on WHO reports, backdated to take into account the one-day delay in reporting North American figures in Geneva. The travel and trade restrictions are based on the sources used in Appendix A. Mexico began processing a backlog of suspected cases on April 28, at which point Mexico’s confirmed cases began to increase rapidly. obligation, the WHO DG’s recommendations are not binding. This suggests that non-binding recommendations might not prove effective in minimizing the economic damage caused by disproportionate trade and travel restrictions. These trade and travel restrictions were more severe for Mexico than for other affected countries. Despite the earliest confirmed cases surfacing in the United States and Mexico around the same time and the large number of cases in the United States, many assumed that Mexico was the origin of the virus without any scientific evidence to confirm this conclusion. In Figure 7a, we display the number of confirmed cases in the three countries in North America: Canada, Mexico and the United States. While Mexico started with a
larger number of confirmed cases, the US figures exceeded that of the Mexican cases on
May 7, 2009, two weeks after the pandemic broke out. The discriminatory treatment of
Mexico is apparent. If one compares the confirmed cases per million people in Canada
and Mexico, Mexico leads (see Figure 7b). But the difference between the US and
Canada disappears altogether.
Insert Figure 7a and 7b here

Sources: CIA Factbook (populations, est. July 2009), WHO, Public Health Canada,
CDC, Secretaria de Salud (Mexico)
The perception that Mexico was the source of the problem appears to be due to three factors. First, Mexico initially reported suspected cases (a much larger number than confirmed cases) while the United States only reported confirmed cases. Second, Mexico applied serious mitigation measures earlier and more broadly than other countries. This not only helped Mexico avoid a greater number of cases in Mexico; it also represents a serious commitment to addressing a global health threat that benefited other countries as well. Third, most of the early confirmed cases outside of Mexico were linked to travel to Mexico. The earliest confirmed cases in the United States are an important exception to this pattern. Thus, trade and travel measures that discriminated against Mexico were based more on the perception of risk than scientific proof of risk. One need only compare the number of confirmed cases in Mexico at the time that many of these restrictions were implemented against Mexico with the number of confirmed cases elsewhere when restrictions were applied (or not) against other countries (see Table 4). Sixth, the WTO was remarkably slow to address the disproportionate trade restrictions, despite being the international organization with jurisdiction over such matters. The WTO Director General’s initial response, when prompted by a reporter’s question, was merely that no WTO members had formally notified the WTO of any trade restrictions. It took eight days from the start of the epidemic for the WTO to issue a joint statement, together with the FAO, OIE and WHO, that pork products handled in accordance with hygienic practices are not a source of infection for the A/H1N1 virus. The WTO is a Member-driven organization, which may place limits on the Director General’s capacity to respond quickly to the use of disproportionate or unjustifiable trade restrictions during disease outbreaks in the absence of formal notifications or complaints. This suggests that WTO rules may need to be changed to allow the Director General to take actions in the absence of formal notification, as the IHR (2005) have done in allowing the WHO to gather information on disease outbreaks from non-governmental sources. Seventh, lack of access to accurate testing equipment severely hampered Mexico’s ability to confirm quickly the cause of death and illness. This led to the perception that Mexico’s epidemic was far worse than any other country’s. As we noted above, while Mexico initially reported suspected cases on a daily basis, the US limited its release of information to confirmed cases, which reinforced the perception that Mexico was much more seriously affected than the US. This perception resulted in more severe trade and travel restrictions applied to Mexico than to the US or any other
country (see Table 4), as well as more severe domestic mitigation measures than
elsewhere. Once Mexico had the capacity to test samples, it limited its release of
information to confirmed cases, as the US had done from the beginning. These
developments underline the importance of domestic testing capacity and an effective
communication strategy for both domestic and international audiences. Figures 8a and
8b compare probable and confirmed cases in Mexico. Figure 8a shows that there is a
gap between the two. This arises directly from the lack of capacity and equipments
available in poor states of Mexico where such epidemics are likely to arise. This stands
in sharp contrast with the situation in the US where a preliminary confirmation is
available within 24 hours of a reported probable case.
Insert Figure 8 here.

If Mexico’s willingness to report outbreaks promptly was based on the notion that this would trigger WHO recommendations that would help to reduce the risk of disproportionate trade and travel restrictions, this incident may serve to undermine the IHR (2005) reporting requirements. However, it is not at all clear that this was Mexico’s motivation for prompt compliance. A more likely explanation is that Mexico’s political leadership recognized the need to respond quickly with mitigation measures in order to minimize the health risks to its own population. The inadequate government response to the 1985 Mexico City earthquake is considered to have been the beginning of the end for the PRI, the party that enjoyed a monopoly on power for seven decades, ending in 2000. An inadequate response to the flu epidemic might produce similarly undesirable political consequences for the Mexican President’s party (PAN) or the Mexico City Mayor’s party (PRD). Effective and timely mitigation measures would also be likely to minimize the economic damage to Mexico’s economy, regardless of the WHO recommendations or other countries’ responses to those recommendations. Another factor that created incentives for Mexico to report and to respond relatively quickly was the existence of confirmed cases in the US, since this could allow
Mexico to benefit from American bargaining power with other countries. However, this
did not occur. Several countries imposed trade restrictions and issued travel advisories
or restrictions that applied to Mexico without applying to the United States. It is not
clear whether this was due to differences between the two countries with respect to
communication strategies (especially with respect to releasing data on suspected cases),
surveillance and testing capacity (which would allow the US to confirm or rule out
cases more rapidly), international bargaining power (for example, pressuring the EU
health minister to retract her statement regarding travel to the US) or some combination
thereof. Nevertheless, their different communication strategies do appear to have had a
major impact on media reporting, which in turn influenced the perceptions and
responses of other countries. It is unclear what impact this might have on incentives to
report only confirmed cases, as opposed to both suspected and confirmed cases.
WHO Guidelines for Communicating with the Public during an Outbreak

The WHO Guidelines for Communicating with the Public during an Outbreak (the “Guidelines”) set out best practices for communicating with the public during an outbreak.34 They resulted from the Report of the WHO Expert Consultation on Outbreak Communications, held in Singapore, 21–23 September 2004, in which the WHO sought expert advice on two questions: (1) how can communication hasten containment of an outbreak, and (2) how can communication help mitigate the social and economic impact? The Guidelines first identify the unique circumstances, common to disease outbreaks, that create unique challenges for public communications: (1) outbreaks are urgent emergencies in which decisions and actions must be taken rapidly, often with support from an informed public; (2) the course of outbreaks is unpredictable, creating unanticipated setbacks and surprises; (3) outbreaks usually alarm the general public, causing great anxiety and extreme behaviors that cause social disruption and economic losses out of proportion to the true severity of the risk (including wearing masks, avoiding travel, fear of hospitals, stigmatization of patients and minority groups, riots, loss of confidence in governments and significant drops in consumer consumption); (4) outbreaks have a high political profile, which can make them a high priority or impede control when information is downplayed or concealed to minimize economic consequences; (5) outbreaks generate media coverage that can help to inform the public or fuel public anxiety out of proportion to the actual threat; and (6) human behaviors usually contribute to the spread of the disease.35 These factors are influenced by the nature of the disease: airborne transmission, high mortality, international spread and the absence of a vaccine or cure will heighten anxiety, factors that the IHR (2005) take into account in determining whether an outbreak constitutes a public health emergency of international concern. 36 Disincentives to report outbreaks include economic impact, the absence of laboratory diagnostic capacity to confirm an unusual disease and the difficulty of spotting an unusual disease in countries where there is constant high morbidity and mortality from other infectious diseases.37 Most, if not all, of these factors were at play in the 2009 swine flu epidemic. Against this backdrop, the Guidelines identify five essential practices for effective outbreak communication, based on the experiences of several countries to disease outbreaks: (1) build trust; (2) announce early; (3) be transparent; (4) respect public concerns; and (5) plan in advance.38 Trust comes from public perceptions (including those of the media) of the motives, honesty and competence of authorities and needs to be developed before a disease outbreak.39 Scientific uncertainty compounds distrust of government and suspicions regarding its motives during an outbreak response, undermining compliance with recommended control measures and allowing counter-productive behaviors to flourish. Distrust is created or increased by concealment, denial, understatement and bold reassurance unsubstantiated by the scientific evidence, both domestically and internationally. Conversely, when government officials report on the outbreak frankly, openly, completely and constantly and engage outside experts, trust increases and control measures are more effective. People who are alert to symptoms are more likely to seek early treatment and awareness of protective behaviors can help to prevent further cases.40 The first communication about an outbreak will influence public perceptions of subsequent communications; 34 WHO, WHO Guidelines for Communicating with the Public during an Outbreak (Geneva, 2005), http://www.who.int/csr/resources/publications/WHO_CDS_2005_32web.pdf, consulted 29 April 2009. 35 Ibid, pp. 7-9. 36 Ibid, p. 10. IHR (2005), Annex 2. 37 Ibid, pp. 10-11. 38 Ibid, p. 3. 39 Ibid, p. 23. 40 Ibid, pp. 12-18. delaying announcements and concealing information can breed lasting distrust.41 While not all information must be revealed in real time, for example to protect patient confidentiality, limits on transparency must be carefully considered.42 Planning communication strategies in advance, while not essential to effective communication during an outbreak, helps to avoid mistakes.43 With the exception of the lack of coordination among different levels of government, Mexico’s communication strategy during the 2009 flu epidemic was largely consistent with WHO communication guidelines. Mexico was right to reveal suspected cases so promptly and frankly, even though this compared unfavorably with the US strategy to focus only on confirmed cases. Given the technical limitations Mexico faced in seeking to confirm cases quickly, a focus on confirmed cases only could have given the impression that Mexico was delaying and concealing information. Thus, in the circumstances, Mexico’s international communication strategy was likely the right one. Mexico’s domestic communication strategy, while relatively well executed, appeared unable to overcome pre-existing mistrust of government in Mexico. On April 30, a survey of 410 Mexico City adults revealed that 57% believed the government was underreporting the numbers, 10% believed the numbers exaggerated, 19% believed official figures and 14% were not sure what to think. Only 49% were somewhat or very afraid of catching the flu, 50% felt little or no fear and 1% did not know. Half believed facemasks somewhat or very effective in preventing infection and half believed they were mostly or completely ineffective. From April 26 to May 8, we collected data on daily mask usage on the Mexico City subway system, sampling 400 passengers per day for a total of 13 days. The percentage of subway passengers wearing face masks peaked on April 27 at around 60 percent. After that, it went down steadily to virtually zero when the alert level was reduced to Level 2 (yellow). Trade Restrictions, the IHR (2005) and WTO Law
The IHR (2005) reflect the intention of its drafters to avoid conflicts with other international legal obligations, particularly WTO law. In particular, the drafters of the IHR (2005) have attempted to facilitate the compatibility between temporary or standing recommendations under the IHR (2005) and trade-related obligations by establishing criteria that are similar to those used in WTO law, especially the Agreement on Sanitary and Phytosanitary Measures.44 In Article 57.1 of the IHR (2005), “States Parties recognize that the IHR and other relevant international agreements should be interpreted so as to be compatible”. This provision reflects the presumption against conflict in international law. Since the language of Article 17 reflects WTO law, it is unlikely that a conflict would arise between the two. However, Article 57.1 goes on to state that “[t]he provisions of the IHR shall not affect the rights and obligations of any State Party deriving from other international agreements”. It seems highly unlikely that this provision would prevent a WTO panel from considering the scientific evidence that supports any recommendations issued by the WHO Director General, as a question of fact. A more reasonable 41 Ibid, p. 24. 42 Ibid, p. 24. 43 Ibid, p. 25. 44 See Committee on Sanitary and Phytosanitary Measures, International Health Regulations Revision, Communication from the World Health Organization, WTO Doc. G/SPS/GEN/522, 21 October 2004, para. 6. interpretation is that a WTO panel would be free to disregard any legal determinations regarding whether a particular trade measure is “more restrictive of international.trade.than reasonably available alternatives that would achieve the appropriate level of health protection”, as a question of law. This interpretation is consistent with WTO and GATT jurisprudence that has taken scientific evidence from the WHO into account in its analysis of trade-restrictive health measures under GATT Article XX(b).45 It is also consistent with WTO jurisprudence that has found that WTO panels are not obligated to apply the rulings of non-WTO tribunals.46 GATT Article XX(b) permits trade restrictive measures that are “necessary to protect human, animal or plant life or health”. The WTO Member that enacted the measure has the burden of proof to show that it meets the requirements of Article XX(b). First, the Member must make a prima facie case that the policy goal at issue falls within the range of policies designed to protect human, animal or plant life or health. Once it is established that the policy goal fits the exception, the Member must demonstrate that the measure is “necessary” to achieve the policy goal. To demonstrate that the measure is necessary involves weighing and balancing a series of factors. First, the greater the importance of the interests or values that the challenged measure is intended to protect, the more likely it is that the measure is necessary. WTO jurisprudence has found that “few interests are more ‘vital’ and ‘important’ than protecting human beings from health risks”. 47 Second, the greater the extent to which the measure contributes to the end pursued, the more likely that the measure is necessary. While WTO law recognizes that “it may prove difficult to isolate the contribution to public health.of one specific measure from those attributable to the other measures that are part of the same comprehensive policy”, the measure in question must be “apt to produce a material contribution to the achievement of its objective”. 48 Third, the less the trade impact of the challenged measure, the more likely that the measure is necessary. Thus, a complete ban on imports is less likely to qualify as necessary than less trade-restrictive measures, such as quarantine or inspection requirements. The fourth issue is whether a WTO-consistent alternative measure the Member concerned could reasonably be expected to employ is available, or whether a less WTO-inconsistent measure is reasonably available. The weighing and balancing process of the first three factors also informs the determination of the fourth. The party that enacted the measure may point out why alternative measures would not achieve the same objectives as the challenged measure, but it is under no obligation to do so in order to establish, in the first instance, that its measure is “necessary”. However, if the party challenging the measure raises a WTO-consistent alternative measure that should have been taken, the party defending the measure will be required to demonstrate why its challenged measure nevertheless remains “necessary” in the light of that alternative or why the proposed alternative is not, in fact, “reasonably ava ilable”, in the light of the interests or values being pursued and the party’s desired level of protection. 49 In the context of GATT Article XX(b), WTO jurisprudence has confirmed that WTO Members have the right to determine the level of protection of health that they 45 Report of the GATT Panel. Thailand – Restrictions on importation of and internal taxes on cigarettes. 1990; Report of the Appellate Body. EC – Asbestos. 2001. 46 Report of the Panel. Argentina – Poultry Anti-Dumping Duties. 2003. 47 Report of the Appellate Body. EC – Asbestos. 2001; Report of the Panel. Brazil – Retreaded Tyres. 2007. 48 Report of the Appellate Body. Brazil – Retreaded Tyres. 2007. 49 Report of the Appellate Body. US – Gambling. 2005. consider appropriate in a given situation and that they are not obliged to use an alternative measure that fails to achieve their desired level of health protection. 50 Article 3.3 of the Agreement on Sanitary and Phytosanitary Measures (SPS Agreement) confirms the right of a WTO Member to establish its own level of sanitary protection. Similarly, the IHR (2005) provide that States are entitled to implement health measures in response to specific public health risks or public health emergencies of international concern, which achieve the same or greater level of health protection than WHO recommendations (Article 43.1(a)). When those health measures affect international trade, they will have to comply with WTO law. However, the right of a WTO Member to establish its own level of health or sanitary protection may not make this a difficult hurdle. In the case of import bans on pork in response to the swine flu outbreak, countries might argue that their measures aim to eliminate entirely any health risk. Since the WHO indicated that there was no risk as long as pork was properly cooked, countries might argue that the risk of improperly cooked pork required an import ban in order to eliminate any health risk. While the right of a WTO Member to determine an appropriate level of health protection is absolute, the measure it chooses to implement its policy, the manner in which it determines the appropriate level of protection and the manner in which it chooses to apply the measure can be challenged and set aside at the WTO.51 In order to justify a health measure under GATT Article XX(b), WTO Members may rely, “in good faith, on scientific sources which, at that time, may represent a divergent, but qualified and respected, opinion”.52 While the scientific basis need not represent the majority view within the scientific community, it must have “the necessary scientific and methodological rigour to be considered reputable science” and be “a respected and qualified source”.53 Under SPS Agreement Article 3.2, there is a rebuttable presumption that SPS measures that conform to international standards, guidelines or recommendations are consistent with the SPS Agreement and GATT. In the SPS Agreement, the standard setting bodies are clearly and exhaustibly identified.54 Deviation from the relevant international standards, guidelines or recommendations must be supported by scientific justification (Article 3.3) and take into account risk assessment techniques developed by the relevant international organizations (Article 50 Report of the Appellate Body. EC – Asbestos. 2001. 51 Marceau G, Trachtman J. The Technical Barriers to Trade Agreement, the Sanitary and Phytosanitary Measures Agreement, and the General Agreement on Tariffs and Trade. 2002. 36 Journal of World Trade 36:811. 52 Report of the Appellate Body. EC – Asbestos. 2001; Report of the Appellate Body. EC – Hormones. 1998. 53 Report of the Appellate Body. Canada – Continued Suspension of Obligations in the EC – Hormones Dispute. 2008. 54 Annex A provides the following definition of “international standards, guidelines and recommendations”: (a) for food safety, the standards, guidelines and recommendations established by the Codex Alimentarius Commission relating to food additives, veterinary drug and pesticide residues, contaminants, methods of analysis and sampling, and codes and guidelines of hygienic practice; (b) for animal health and zoonoses, the standards, guidelines and recommendations developed under the auspices of the International Office of Epizootics; (c) for plant health, the international standards, guidelines and recommendations developed under the auspices of the Secretariat of the International Plant Protection Convention in cooperation with regional organizations operating within the framework of the International Plant Protection Convention; and (d) for matters not covered by the above organizations, appropriate standards, guidelines and recommendations promulgated by other relevant international organizations open for membership to all Members, as identified by the Committee. The WHO would qualify under paragraph (d) if so identified by the Committee. 5.1). In the SPS Agreement, the requirement of a risk assessment (Article 5.1) and “sufficient scientific evidence” (Article 2.2) prevent the use of health measures for arbitrary or unjustifiable discrimination between Members or as a disguised restriction on international trade. An SPS measure must be sufficiently supported or warranted by a risk assessment, which may be conducted by the WTO Member in question, another WTO Member or an international organization. 55 The chosen level of protection must not affect the rigour or objective nature of the risk assessment, which must evaluate possible adverse effects using scientific methods.56 Finally, under both GATT Article XX(b) and SPS Agreement Article 2.3, health measures must not be applied in a manner that results in discrimination or a disguised restriction on international trade. While it is not clear whether the countries that imposed trade restrictions did so following a risk assessment that would meet the requirements of the SPS Agreement, the discrimination between pork imports from Mexico and other countries affected by swine flu might be justifiable on the basis that the mortality and severity of the epidemic in Mexico is greater and the evidence indicated that the virus originated in Mexico. Continued discrimination between Mexican products and products from other countries could fail the test of the Article XX chapeau once it became apparent that the risk in other countries was comparable to the situation in Mexico. In other words, as long as the same conditions prevail in the different countries with respect to the level of risk, the discrimination would be arbitrary and unjustifiable. In most cases, health measures will be regulated by both the GATT and the SPS Agreement. The Agreement on Technical Barriers to Trade (TBT Agreement) does not apply to SPS measures (TBT Agreement Article 1.5). However, extraterritorial health measures, which are aimed at protecting health outside the jurisdiction of the country that enacts the measure, could fall under the ambit of the TBT Agreement.57 The Preamble of the TBT Agreement also allows each WTO Member to determine the level of protection it considers appropriate. Article 2.2 only requires a consideration of “available scientific and technical information”. Since the TBT Agreement does not explicitly regulate risk assessment or require scientific bases for regulations, the implicit requirement for some scientific basis should be less rigorous than the explicit requirements of the SPS Agreement.58 However, TBT Agreement Article 2.5 creates a rebuttable presumption of compliance with Article 2.2 where a technical regulation aimed at health protection is in accordance with relevant international standards. Moreover, under Article 2.2, the analysis of whether a technical regulation is more trade-restrictive than necessary to fulfill a legitimate objective will be very similar to the analysis under GATT Article XX(b). It may be difficult for WTO Members to justify trade restrictions on products where there is insufficient scientific evidence that the product poses a risk to human health59 or when the trade measures will not address the risk.60 However, the IHR 2005 (like the IHR 1969) does not seriously deter countries from implementing trade 55 Report of the Appellate Body. EC – Hormones. 1998. 56 Report of the Appellate Body. EC – Hormones. 1998. 57 Marceau G, Trachtman J. The Technical Barriers to Trade Agreement, the Sanitary and Phytosanitary Measures Agreement, and the General Agreement on Tariffs and Trade. 2002. 36 Journal of World Trade 36:811. 58 Marceau G, Trachtman J. The Technical Barriers to Trade Agreement, the Sanitary and Phytosanitary Measures Agreement, and the General Agreement on Tariffs and Tra de. 2002. 36 Journal of World Trade 36:811. 59 Report of the Appellate Body. EC – Hormones. 1998. 60 Report of the GATT Panel. Thailand – Restrictions on importation of and internal taxes on cigarettes. 1990. restrictions that do not have a solid scientific basis. While the WTO provides the real disciplines in this context, the WTO process does not work quickly enough because countries can enact harsh temporary measures, keep them in place while the crisis lasts, and remove them before any serious WTO dispute settlement remedy could be secured. Once an outbreak of an infectious disease has been reported, the affected country might have an incentive to comply with WHO recommendations regarding appropriate responses, in order to minimize the risk of disproportionate responses on the part of other countries. The WHO’s assessment of the public health risk and the appropriate measures to take will carry more weight than the affected country’s assessment of the situation. Failure to comply with WHO recommendations, or under compliance, could have a negative impact not only on the protection of its citizens but also on the affected country’s effort to persuade other countries to avoid imposing trade and travel restrictions. Given the economic and political incentives, there is probably no need to make compliance with WHO recommendations mandatory as far as they apply to the affected country. The key obligation is to report the outbreak, at which point the risk of negative economic consequences becomes real. It would be redundant for the IHR (2005) to provide enforceable legal obligations to regulate the use of disproportionate trade restrictions in response to a reported outbreak, since those obligations are addressed in WTO law. The key role of the WHO in this regard is to provide an objective risk assessment and to make recommendations regarding appropriate responses based on scientific evidence, both of which are provided for in the IHR (2005). The WHO’s determinations on these issues may be relevant to determine whether trade-restrictive health measures can be justified under the general exceptions of GATT Article XX (b) or permitted under the SPS Agreement or the TBT Agreement. Evidence from the WHO has played a role in WTO cases regarding the compatibility of trade-restrictive health measures with GATT and WTO law. 61 When countries impose unjustified trade restrictions it may take a few years to resolve the matter through the dispute settlement system of the WTO, by which point the economic damage has already occurred. However, in the age of internet, email and mobile telephones, it has become difficult for countries to suppress information on outbreaks of disease. Moreover, as Fidler has noted, international law tends to “shape the debate” in international negotiations.62 This is as true in consultations regarding trade measures as it is in global health diplomacy. The use of disproportionate trade measures in response to outbreaks of infectious diseases undermine international health protection by discouraging reporting of such outbreaks and undermining incentives to comply with WHO recommendations under the IHR (2005). Global Health Law and World Trade Law can and should be mutually supportive. However, the formal dispute settlement system of the WTO is unlikely to be effective in addressing this issue. Rather, disproportionate trade restrictions will have to be addressed in negotiations in which countries are persuaded that it is in the best interests of all countries to comply with the existing lega l framework in order to ensure that both the multilateral trade system and multilateral cooperation on world health issues function adequately. Transparency needs to be encouraged (and discriminatory and excessive trade and travel restrictions discouraged) in the interests of public health. For example, information regarding the behavior of (H1N1) in the Southern Hemisphere winter is 61 Baker M, Fidler D. Global Public Health Surveillance under New International Health Regulations. EID. 2006 12:7 1058-1065. 62 Fidler D. Influenza Virus Samples, International Law and Global Health Diplomacy. EID. 2008 14:1 88-94. important to determining whether a vaccine is necessary, according to the WHO. In an
effort to determine how this virus might behave in the next Northern Hemisphere
winter, the CDC negotiated with the Pan American Health Organization and health
ministries in Latin America and other Southern Hemisphere countries to monitor the
virus dur ing their winter flu season. If countries perceive that they will suffer from more
severe trade and travel restrictions the more transparent they are, this will discourage the
sharing of vital information.
Patents and Access to Antiviral Medications
The threat of compulsory licenses has been used in the context of a perceived national health emergency to reduce the cost of obtaining stockpiles of medicine in the United States and Canada. In 2001, these countries used such a threat to reduce the price of ciprofloxacin in their negotiations with Bayer in order to address real and imagined threats of anthrax, respectively. At the 2001 WTO Ministerial Conference in Doha, the severity of the HIV/AIDS crisis and other public health issues in many parts of the developing world prompted several developing countries to adopt a common position calling for clarifications to the rights of governments to issue compulsory licenses to protect public health and, in particular, to promote access to medicines for all. The resulting Declaration on the TRIPS Agreement and Public Health also identified a gap in the Agreement on Trade-Related Aspects of Intellectual Property Rights (TRIPS), under which only countries with adequate pharmaceutical manufacturing capacity could in practice exercise the right to issue compulsory licenses on pharmaceutical products. Two years of multilateral negotiations on this issue ultimately led to a decision to amend the TRIPS Agreement (known as the Paragraph 6 Decision), but it took two more years to adopt the amendment formally and it has yet to be adopted by the two-thirds of the WTO Members required for it to enter into force. In spite of these developments at the WTO, the pharmaceutical industry has continued to use its political influence to discourage the compulsory licensing of patents. When Thailand exercised its rights under WTO law to issue compulsory licenses on some pharmaceutical products (including antiretroviral drugs for its HIV/AIDS treatment program), the US Trade Representative placed Thailand on its priority watch list of countries and characterized the Thai government’s decision as “further indications of a weakening of respect for patents”. This kind of political pressure from the governments of the major pharmaceutical companies discourages the use of compulsory licensing to increase affordable access to medicine in developing countries, undermines the international rule of law and may pose a threat to global public health by making it more difficult for developing countries to stockpile adequate supplies of medicines in preparation for pandemics. As we noted above, Mexico’s stockpile of antiviral medicine to treat influenza is sufficient to serve the needs of about 1.3 percent of its population, whereas developed countries have stockpiled enough to treat 25-50% of the population that could need such medicines in an influenza pandemic. Strong patent rights for pharmaceutical products in developing countries are not necessary to provide research incentives to invent new medicines. Parallel imports of cheaper drugs from developing countries are unlikely to undermine research incentives in developed country markets. Patent rights in fact have the effect of stifling innovation by providing an incentive to patent holders to invest in legal action to extend the life of their patents and to prevent others from developing new innovations. In economic terms, this is an inefficient way of allocating economic resources. Striking the right balance between incentives to invent new medicines and affordable access to those medicines is a key issue in addressing global diseases. Governments grant patents to inventors on the national level, which means that they only have legal effect in the jurisdictions where the application for a patent has been granted. One of the conditions for granting a patent is that the inventor disclose the data used in the producing the invention. TRIPS established minimum standards for the protection of intellectual property rights in the national laws of WTO Members. TRIPS requires that patents be granted for a minimum of twenty years and that they provide patent owners with the exclusive right to prevent third parties from making, using, selling or importing a patented product without the owner’s consent. However, TRIPS allows exceptions to these patent rights, including the right of governments to issue compulsory licenses under certain conditions. A compulsory license authorizes a third party to produce and sell the invention without the patent owner’s consent. This exception plays a key role in balancing the rights of patent owners against the needs of consumers of patented products. The right to issue a compulsory license on a patented drug provides countries with bargaining power to extract price concessions for patented drugs or to issue compulsory licenses if price negotiations fail. However, this bargaining power applies only to countries that have the manufacturing capacity to produce generic drugs, since the generic drugs must be used to predominately supply the national market of the country that issues the compulsory license. Countries that lack domestic manufacturing capacity would need to be able to import generics manufactured under compulsory licenses in other countries in order to enjoy a comparable level of bargaining power. The Paragraph 6 Decision established rules to allow this to happen. The Paragraph 6 Decision waives an exporter’s obligation to supply predominantly its domestic market, enabling any country with manufacturing capacity to issue a compulsory license to produce generic drugs for export to countries that have insufficient or no manufacturing capacity, subject to several conditions. No formal restriction on the countries that are eligible to import exists under the Paragraph 6 system. All WTO members, other than least-developed countries, are required to notify the WTO of their intention to use the Paragraph 6 system. Some countries have made a commitment not to use the Paragraph 6 system as importers, while several others have committed to using the system as importers only in situations of national emergency or extreme urgency. Mexico is in the latter category, which means that Mexico has agreed, in effect, not to use the system simply to lower the general cost of purchasing medicine for public health care systems. No restrictions exist regarding the countries that are eligible to export. A key issue for countries that lack sufficient manufacturing capacity to effectively exercise their right to issue compulsory licenses is whether the Paragraph 6 system can be used to stockpile medicines before the emergency occurs. The Paragraph 6 system works too slowly and faces too many political obstacles to serve countries in an actual emergency. This means that Mexico, for example, needs to ensure that it has adequate manufacturing capacity to issue a compulsory license in order to acquire sufficient stockpiles of medicine in advance of a pandemic, or to use the threat of a compulsory license to lower the price in negotiations with the patent holders, also in advance of a pandemic. The Paragraph 6 system does not apply to countries that have sufficient manufacturing capacity to issue compulsory licenses to meet the needs of their own populations. The question in a given case is whether the importing country has manufacturing capacity for the pharmaceutical product in question. For example, countries like China, India and Brazil, if they lack capacity for a particular medicine, could use the Paragraph 6 system to import drugs from generic manufacturers in other countries. However, where developing countries do have manufacturing capacity, they will have to determine whether and how to use compulsory licensing to reduce the cost of providing treatment by issuing licenses to their own generic manufacturers. When a country issues a compulsory license to its own generic drug manufacturers to serve its own market, the Paragraph 6 Decision will not apply. In the case of a fast- moving global disease, such as SARS or influenza, or the use of biological agents in war or terrorism, such as anthrax, governments may wish to
stockpile medical treatment before the disease occurs. In these circumstances, WTO
members can exercise their right to issue compulsory licenses under TRIPS Article 31
or the Paragraph 6 System or use the threat of a compulsory license to expand
production or to lower the cost of the drugs that they need to stockpile.

Conclusion

Accelerating globalization has changed the context in which the WHO works, and has also hastened the spread of infectious diseases. Moreover, the multiplicity of players involved in tackling global health issues has increased the need for global leadership to convene and coordinate activities related to international health. In the wake of the SARS epidemic, the IHR (2005) provided for binding obligations (reporting outbreaks) and non-binding recommendations from the WHO. In addition, the WHO studied best practices regarding communication strategies during an outbreak. Many countries used past experiences with pandemics to prepare pandemic plans, including Mexico and the US. All of these developments were put to the test in the 2009 swine flu epidemic. As a result, the experience with this epidemic is a source of valuable information on how to continue improving national and global responses to public health threats of international concern. Understanding past outbreaks of diseases can lead to new public health measures and other interventions to more effectively address existing diseases and to better prepare the world for future pandemics. While medicine and science have a crucial role to play in addressing pandemics, whether slow moving (like HIV/AIDS) or fast moving (like influenza), the social, legal, political, financial and economic ramifications of pandemics can not be ignored. Well-considered social, legal, political and financial strategies are essential in order to address any pandemic effectively, but they are particularly important when it comes to addressing fast-moving pandemics. International health law is far less developed than international trade law, due to the perception that the latter is of greater economic importance than the former. However, global pandemics are also of great importance to economic growth. The key difference between international trade and pandemics is that the former is a positive force for economic growth, while the latter has a negative impact. International trade raises standards of living, whereas pandemics lower standards of living and the length and quality of life. If economic importance is the key reason for having effective global policies, laws and institutions, then the further development an effective global framework to address the negative consequences of pandemics should be given much greater priority. The lack of financial assistance to help many developing countries build their required core surveillance and response capabilities under the IHR (2005) is an important gap in pandemic preparedness. The A/H1N1 outbreak highlighted the difficulties that can arise in rapidly detecting public health threats, even in a middle income country like Mexico or a wealthy country like the US, both of which had engaged in intense international cooperation and preparation for such an event. In addition, this outbreak revealed an asymmetrical application of travel and trade restrictions between Mexico and the US. In our view, Mexico was singled out for more numerous and more severe treatment for all the wrong reasons. Mexico reported the outbreaks and determined the seriousness of the threat as quickly as the US. Mexico applied mitigation measures more quickly and more broadly than any other country. Mexico communicated its actions and all of the latest developments honestly and transparently. Mexico’s exemplary treatment of this outbreak limited the spread of the virus both within Mexico and internationally. The disproportionate response of several countries to Mexico’s response may well discourage other countries from acting so quickly, effectively and transparently in future disease outbreaks, to the detriment of all countries. The lack of any effective recourse under either the IHR (2005) or the WTO compounds the problem of disproportionate and asymmetrical travel and trade restrictions and creates disincentives to report outbreaks and deal with them in a transparent and decisive manne r. This is of particular concern in view of the importance of rapid and transparent responses to disease outbreaks and suggests a need for increased attention to the issue of such travel and trade restrictions on the part of both the WHO and the WTO. Find ing ways to avoid such inappropriate responses should also form part of the pandemic preparation process at the national level. Appendix A: Diary of a Global Influenza Outbreak63
As we noted above, it is important to note that the daily reports of total confirmed cases and deaths vary depending on the source. For example, Mexico has provided two daily updates whereas the CDC has provided only one daily update. In addition, the federal government of Mexico communicates national statistics, while the Mexico City government communicates statistics for the Federal District only. The WHO also provides only one daily update, which is usually one day behind the latest figures. For this reason, there often appear to be discrepancies in the figures. CDC reports that H1N1 swine flu virus is found in US in a previously healthy 32-year-old pregnant woman who died 8 days after she was hospitalized for pneumonia. Four days before she got sick she had visited a swine exhibit at a county fair where a flu- like illness was widespread among the pigs. Follow-up studies showed that 76% of swine exhibitors had antibodies to the swine flu virus, though no illnesses were reported. However, researchers found that one to three healthcare workers who had contact with the woman experienced mild flu symptoms with antibody evidence of swine flu exposure. An outbreak of swine flu takes place in the Sichuan Province of China. 24 people die. Researchers report that a new swine flu subtype found in Missouri pigs (H2N3) combined genes from avian and swine flu viruses and was transmissible in pigs and ferrets. CDC researchers and public health officials from Wisconsin publish a case report in Emerging Infectious Diseases on a healthy 17-year-old boy who had mild respiratory symptoms in December 2005, 3 days after helping his brother-in- law butcher pigs. CDC investigators identify the virus, as a swine influenza A (H1N1) triple reassortant virus, A/Wisconsin/87/2005 H1N1. CDC reports on a person in Texas infected with a swine influenza A/H1N1 virus in mid-October following several exposures to pigs, including a sick one. An outbreak of respiratory disease begins in La Gloria, Veracruz. 10-year-old boy in San Die go County falls ill. The CDC later determines the cause to be the same strain of A/H1N1 influenza as in Mexico. The boy had no contact with pigs. 9-year-old girl in Imperial County is treated for a cough and a 104-degree fever. The CDC later determines the cause to be the same strain of A/H1N1 influenza as in Mexico. The girl had no contact with pigs. Boy falls ill in La Gloria, Veracruz. His sample tests positive for A(H1N1) on April 23. 63 Sources: various news media from Mexico (El Financiero, El Universal, Milenio), US (Wall Street Journal, New York Times, LA Times, Washington Post, ABC, American Press), Canada (Globe and Mail, Canadian Press), Britain (Financial Times, Guardian, Independent, BBC, Economist), Asia (China Post) as well as WHO and CDC web sites, Morbidity and Mortality Weekly Report (http://www.cdc.gov/mmwr), Emerging Infectious Diseases (http://www.cdc.gov/eid), FluView Weekly Influenza Surveillance Report (http://www.cdc.gov/flu/weekly/), Center for Infectious Disease Research and Policy (www.cidrap.umn.edu), WTO News and WHO and Mexican government news conferences.

Source: http://cdei.itam.mx/medios_digitales/archivos/investigacion/CondonSinhaFlu.pdf

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