Flu

U.S. flu vaccine a good match; season moderate so far

U.S. flu vaccine a good match; season moderate so far

This season's flu vaccine seems to be working pretty well, weakening the punch of a nasty bug that's going around, U.S. health officials said Thursday.

Preliminary figures suggest the vaccine is 48 percent effective. That's not bad since the strain that's making most people sick is one of the worst. Experts consider it a good year when a flu vaccine is 50 to 60 percent effective.

"We're happy" so far this year, said Dr. Alicia Fry, a flu expert at the Centers for Disease Control and Prevention.

The flu vaccine is changed each year based on the best guess at which three or four strains will be the biggest problem for the next season. The current vaccine is...

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