Key TakeawaysThis season's flu vaccine didn't work as well as usual, officials sayA new virus strain did not match the shot ...
As the U.S. flu season winds down, health officials say the flu vaccine didn't work very well, with one of its worst ...
NEW YORK (AP) — As the U.S. flu season winds down, health officials say the flu vaccine didn’t work very well, with one of its worst effectiveness rates in more than a decade. A new strain that ...
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