Viral mismatch between circulating strains and vaccine may have weighed down effectiveness ...

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As the U.S. flu season winds down, health officials say the flu vaccine didn’t work very well, with one of its worst ...

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Why flu vaccines didn’t work that well in the US this season - Flu infections surged in late December and were especially ...

Key Takeaways This season's flu vaccine didn't work as well as usual, officials sayA new virus strain did not match the shot ...

Influenza deaths have soared to new heights in Alberta this year, according to nearly two decades worth of data, prompting concern from health experts.

FINGER LAKES, N.Y. — As flu season comes to a close, health officials reported that this year’s vaccine was not very ...

Twenty-two schools reported at least 10% student illness, with Dubuque County having the highest number of affected schools.

More than 100 children have died so far this season ...