News & Perspective

Apr 06, 2010

Apr 06, 2010

New Canadian studies suggest seasonal flu shot increased H1N1 risk

(CIDRAP News) – Despite a rapidly launched range of studies, investigators in Canada are still unable to say—or to rule out—whether receiving a seasonal flu vaccination in the 2008-09 season made it more likely that Canadians would become ill from 2009 pandemic H1N1 flu.