Flu shot effectivenness is OK -- US numbers indicate

Flu shots are doing OK vs. virus, US numbers indicate Early estimates suggest flu shots are performing OK in the current U.S. winter flu season. The vaccines were around 40% effective in preventing adults from getting sick enough from the flu that they had to go to a doctor’s office, clinic or hospital. AP News

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Officials generally are pleased if a flu vaccine is 40% to 60% effective.

The shots tend to do better when they are well matched against the circulating flu strains. Officials say that’s what’s happened during this — relatively typical — flu season.

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