This two-page report is an update of the information released earlier today on swine flu cases in the United States, Mexico, and Canada. It includes number of cases, affected areas, and laboratory results, as well as laboratory results, surveillance and outbreak control measures, and how this epidemic relates to the criteria established by the International Health Regulations (IHR).

 Influenza Cases by a New Subtype: Regional Update (26 April 2009, 6 pm EST)