MMWR UPDATE: Influenza Activity — United States, August 30, 2009 – March 27, 2010, and Composition of the 2010 – 11 Influenza Vaccine

Morbidity and Mortality Weekly Report (MMWR) April 16, 2010 / 59(14);423-430

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MMWR UPDATE: Influenza Activity — United States, August 30, 2009 – March 27, 2010, and Composition of the 2010 – 11 Influenza Vaccine