Study Suggests 20% of US Americans Infected During 2009 H1N1 Pandemic
CIDRAP NEWS SCAN, Thursday 1 November 2012

A serologic survey by the US Centers for Disease Control and Prevention (CDC) suggests that about 20% of the US population, including more than half of school children, were infected with the pandemic H1N1 (pH1N1) flu virus in 2009, says a report in PLoS One.



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