⚠Situational awareness tool — not an operational trigger. Any mobilization requires direct WHO verification and validation through your institutional protocol.

HIGH RISK

Avian Influenza

📍 United States

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Confirmed cases

773

Deaths

Case fatality rate

0.0%

Cumulative cases since outbreak start — USDA APHIS bulletin dated 2025-11-26

Report date : 2025-11-26

Official report date — in isolated zones, field onset typically precedes this by days to weeks.

Region : americas

USDA APHIS — H5N1 HPAI confirmed in 773 Dairy Milking Cows herds in California. Latest detection: 2025-11-26. Source: https://www.aphis.usda.gov/livestock-poultry-disease/avian/avian-influenza/hpai-detections/hpai-confirmed-cases-livestock

Focal Point GuidanceSTANDARD MONITORING

First actions

→Log in national surveillance system — continue routine monitoring
→Compare with seasonal baseline for this region and disease
→Include in weekly surveillance briefing — escalate if trend worsens (▲ cases or CFR)

Source: USDA APHIS↗

🔄Last checked by HealthWatch : 2h ago

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Cite this page (Vancouver)

HealthWatch Global. Avian Influenza outbreak — United States [Internet]. 2025-11-26 [cited 2026 Jul 11]. Available from: https://healthwatch-global.com/en/outbreak/469b81d0-5246-42ae-8c8f-b242560c0885. Data source: USDA APHIS.

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