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Map: International Co-circulation of 2009 H1N1 and Seasonal Influenza
(As of October 30, 2009; posted October 30, 2009, 4:30 PM ET)

This website is archived for historical purposes and is no longer being maintained or updated. For updated information on the 2011-2012 flu season, see the CDC Seasonal Flu website.

This picture depicts a map of the world that shows the co-circulation of 2009 H1N1 flu and seasonal influenza viruses. The United States, Canada, Europe, Australia, Kenya, China and Hong Kong (China) are depicted. There is a pie chart for each that shows the percentage of laboratory confirmed influenza cases that have tested positive for either 2009 H1N1 flu or other influenza subtypes. The majority of laboratory confirmed influenza cases reported in the United States, Canada, Europe, Australia, China and Hong Kong (China) have been 2009 H1N1 flu.

 
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