A preliminary study rated this year’s vaccine as 62 percent effective, even though it is a good match for the most worrisome virus circulating. That is considered “moderately” effective — the vaccine typically ranges from 50 percent to 70 percent effective.
A note to whoever's curious: You can get real-time influenza virus reports from the World Health Organization's FluNet, which provides links to a huge number of charts describing flu subtypes detected worldwide. Have a look, it's an interesting diversion.
