News & Perspective

Mar 01, 2013

Mar 01, 2013

Study: Getting flu shot 2 years in a row may lower protection

(CIDRAP News) – Experts are puzzled by a new study in which influenza vaccination seemed to provide little or no protection against flu in the 2010-11 season—and in which the only participants who seemed to benefit from the vaccine were those who hadn't been vaccinated the season before.

Oct 25, 2011

Oct 25, 2011

Strict meta-analysis raises questions about flu vaccine efficacy

Editor’s Note: This article covers research conducted in part by CIDRAP researchers. Please note that CIDRAP News operates independently in relation to CIDRAP's research and policy programs.

See also: Public health groups say flu vaccine is best tool, despite limitations

Feb 11, 2011

Feb 11, 2011

Study showing high effectiveness for H1N1 vaccine stirs debate

(CIDRAP News) – A recent case-control study estimates that the adjuvanted pandemic H1N1 influenza vaccine used in Canada was effective 93% of the time, a substantially higher figure than seen in several other studies and one that has raised some eyebrows among other flu vaccine researchers.

Jun 11, 2009

Jun 11, 2009

WHO declares pandemic of novel H1N1 virus

(CIDRAP News) – After delaying action for weeks as the novel H1N1 influenza virus took hold in far-flung parts of the globe, the World Health Organization (WHO) today declared a full-fledged pandemic, formally recognizing that the virus is becoming a global contagion.

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