News & Perspective

Mar 21, 2011

Mar 21, 2011

Preliminary studies show lower flu-shot effectiveness in Europe

(CIDRAP News) – Preliminary studies suggest that this year's trivalent seasonal flu vaccine used in Europe was less effective against the 2009 H1N1 virus than last year's monovalent H1N1 vaccine was, possibly because of some degree of mutation in the virus, according to recent reports in Eurosurveillance.