Event Brief
Dec 15, 2025 at 2:08 PM ET
Mexico confirms first case of 'super flu' variant
By The BriefBrief
Health authorities in Mexico report the first case of influenza A(H3N2) subclade K, known as the 'super flu.'
WHO: Health authorities in Mexico
WHAT: Confirmed first case of influenza A(H3N2) subclade K
WHEN: Dec 14, 2025 at 7:00 PM ET
WHERE: Mexico
WHY: To inform the public about the new variant of influenza
How this brief is built: The BriefBrief correlates multiple sources into one evolving event brief, updated as new facts emerge.
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