A ‘Super Flu’ K-Strain Is Raising Early Christmas Alarms, Here’s What We Know

A ‘Super Flu’ K-Strain Is Raising Early Christmas Alarms, Here’s What We Know

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Updated Dec 15, 2025 | 10:01 PM IST

SummaryMutated H3N2 subclade K, dubbed the super flu, is driving early flu surges globally, with hospitalizations jumping sharply in the UK and cases rising in Australia. Lower population immunity is aiding spread, though current vaccines still offer protection, prompting urgent vaccination and masking advisories as winter strains health systems worldwide severely.

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