News & Perspective

Feb 13, 2009

Feb 13, 2009

WHO picks new B strain for 2009-10 flu vaccine

(CIDRAP News) – Because of a suboptimal match between this year's flu vaccine and circulating influenza B viruses, the World Health Organization (WHO) has recommended changing one of the three strains used in flu vaccines for the Northern Hemisphere next fall and winter.

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.

Jan 31, 2013

Jan 31, 2013

Studies: Flu vaccine effectiveness waned over 2011-12 season

(CIDRAP News) – It's been more or less an article of faith that influenza vaccination in the fall will protect a person through the winter flu season, but three studies published today in Eurosurveillance are challenging that view.

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