Disease and outbreak signals in CA
Plain-English summaries with credibility tiers. Always verify details on the original source - not medical advice.
How to read this page
Signals reflect what publishers have posted, not every exposure in the country. Use the map for geography, open each alert for dates, and pair this page with your local health department for mandates and clinical guidance.
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Recent signals
- 2026 Norovirus Oyster Outbreak: What the FDA and Washington State Reported - Norovirus - U.S. FDA - event 2026-06-27
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Set up alertsIf you are tracking CA, these links pair well with the map and alert index.
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Browse source-linked notices on the alerts index.
Popular searches
Latest reports
- Why Norovirus Spreads So Fast in Schools, Restaurants, and Events
- Norovirus Symptoms vs. Food Poisoning: How to Tell the Difference
- 2026 Norovirus Oyster Outbreak: What the FDA and Washington State Reported
- WHO Disease Outbreak News Explained: How to Read DON Alerts
- Outbreak Map: How to Track Disease Alerts Near You
- Hantavirus vs. Norovirus on Cruise Ships: Key Differences
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