News & Perspective

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.