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Map: International Co-circulation of 2009 H1N1 and Seasonal Influenza
(As of January 16, 2010; posted January 22, 2010, 5:30 PM ET)

This picture depicts a map of the world that shows the co-circulation of 2009 H1N1 flu and seasonal influenza viruses. Canada, Europe, China, and Japan are depicted. There is a pie chart for each that shows the percentage of laboratory-confirmed influenza cases that have tested positive for 2009 H1N1, A (H1), A (H3), or B flu subtypes. The majority of laboratory-confirmed influenza cases reported in the Canada, Europe, China, and Japan have been 2009 H1N1 flu.