Originally Posted By: ponder
Flu vaccinations would be great if - They guessed correctly and made the vaccination for the correct virus more than half of the time.

A quote from the CDC website: "In 16 of the last 19 U.S. influenza seasons, the viruses in the influenza vaccine have been well matched to the predominant circulating viruses."

Sounds like a pretty good track record to me. And the vaccine doesn't have to be a perfect match to provide a benefit.