Effectiveness of 2008-09 Trivalent Influenza Vaccine Against 2009 Pandemic Influenza A (H1N1) -- United States, May-June 2009

Gargiullo, P.; Shay, D.; Katz, J.; Bramley, A.; Nowell, M.; Michalove, J.; Kamimoto, L.; Singleton, J. A.; Lu, P. J.; Balluz, L.; Siston, A.
November 2009
MMWR: Morbidity & Mortality Weekly Report;11/13/2009, Vol. 58 Issue 44, p1241
The article discusses the results of a case-cohort analysis of the effectiveness of the trivalent influenza vaccine against the pandemic H1N1 virus in the U.S. from May to June 2009, conducted by the Centers for Disease Control and Prevention (CDC). The study found that seasonal influenza vaccination had no effect on the risk for contracting the 2009 virus. It recommended getting shots for seasonal and pandemic influenza.


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