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Flu Hospitalizations Stay High Across U.S. as H3N2 Subclade K Drives Season

Officials urge vaccination, testing, early antivirals to curb severe illness.

Drifted H3N2 Subclade K Drives Early Flu Surge as New York ER Visits Hit Decade High

New H3N2 ‘Subclade K’ Drives Early U.S. Flu Surge as New York Sets Weekly Case Record

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