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Flu Vaccination

Flu Surges to 25-Year High as H3N2 ‘Subclade K’ Drives U.S. Wave

Early evidence suggests this season’s vaccine still offers meaningful protection against the drifted strain.

Flu Visits Hit Record Levels as Drifted H3N2 Variant Drives Early U.S. Surge

WHO Says Early H3N2 ‘Subclade K’ Flu Wave Is Straining Hospitals Across Europe

Drifted H3N2 ‘Subclade K’ Drives Early U.S. Flu Uptick Before Holidays