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This brief two-page report is an update of information published yesterday on influenza A(H1N1) activity in the United States, Mexico, and Canada, indicating the number of cases, affected areas, and laboratory results, as well as surveillance and outbreak control measures being taken and how this outbreak fits the criteria of the International Health Regulations (IHR) as a public health emergency of international concern.

icon Influenza Cases by a New Subtype: Update for the Americas (27 April 2009, 1 pm EST)

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Regional Office for the Americas of the World Health Organization
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