News & Perspective

(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.

(CIDRAP News) – New European studies reported today in Eurosurveillance suggest that this year's influenza vaccine is providing good protection against influenza B viruses but only moderate protection against type A—findings more or less consistent with earlier results in the United States.

The world needs much better influenza vaccines, but the quest for them faces a formidable barrier: overconfidence about the effectiveness of existing influenza vaccines.