
Flu by state: Where this season’s highly contagious variant is spreading the most
Fox News
An influenza A H3N2 mutation is sweeping the U.S. with more severe symptoms, as the CDC reports 4.6 million illnesses and very high activity in seven states.
Angelica Stabile is a lifestyle reporter for Fox News Digital.
The World Health Organization stated on its website that the K variant marks "a notable evolution in influenza A (H3N2) viruses," which some say calls into question the effectiveness of this season's influenza vaccine against the strain.
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