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Vaccination

H3N2 ‘Subclade K’ Drives Early U.S. Flu Surge as Hospitalizations Climb

Health leaders recommend vaccination with early antivirals to reduce hospitalizations despite a partial vaccine mismatch.

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

New H3N2 Variant Emerges as Canada’s Flu Season Starts and U.S. Activity Remains Low

LA and Riverside Counties Report First Flu Deaths of 2025–26 Season

New H3N2 ‘Subclade K’ Drives Early Flu Surges as U.S. Officials Urge Vaccination

Early UK Flu Surge Driven by Drifted H3N2 Variant Prompts Urgent Vaccine Push