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Subclade K

Every story about Subclade K, updated as news breaks.

1 stories·Updated Jan 3

What to know

Subclade K is a new variant of the influenza A (H3N2) virus circulating in the 2026 flu season. Jan 3
Health officials have dubbed the strain 'super flu' due to its higher infection rate and severity. Jan 3

Timeline

Jan 3, 2026

Health
Health officials label new H3N2 subclade K variant 'super flu

Jan 3·2 min read