Event Brief
Dec 1, 2025 at 3:08 PM ET
Waning Immunity Fuels Whooping Cough Outbreaks in SF
By The BriefBrief
Falling vaccination rates raise concerns as pertussis cases rise, endangering infants.
WHO: Local health officials and parents
WHAT: Increase in whooping cough cases
WHEN: Nov 30, 2025 at 7:00 PM ET
WHERE: San Francisco, CA
WHY: Declining vaccination rates and waning immunity
How this brief is built: The BriefBrief correlates multiple sources into one evolving event brief, updated as new facts emerge.
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