Equine Herpesvirus-1 Neurologic in California
As of November 2026, California has 2 Equine Herpesvirus-1 Neurologic alerts in the past 30 days (2 confirmed cases).
Risk Level
🟡 Moderate
Isolated cases — monitor the situation
Cases (30 days)
2
Total Cases
46
Counties Affected
9
Most recent Equine Herpesvirus-1 Neurologic alert in California: Nov 3, 2026
Equine Herpesvirus-1 Neurologic Alerts in California
Los Angeles, California
Nov 3, 2026 · resolved
1
confirmed
Los Angeles, California
Oct 23, 2026 · official quarantine
1
confirmed
Santa Barbara, California
Mar 23, 2026 · official quarantine
1
confirmed
Santa Barbara, California
Mar 2, 2026 · official quarantine
1
confirmed
Sonoma, California
Jun 17, 2025 · resolved
1
confirmed
Los Angeles, California
Jun 7, 2025 · resolved
6
confirmed
Sonoma, California
Jun 4, 2025 · official quarantine
1
confirmed
Los Angeles, California
May 21, 2025 · resolved
6
confirmed
Los Angeles, California
May 16, 2025 · resolved
2
confirmed
Alameda, California
May 16, 2025 · resolved
3
confirmed
Alameda, California
Apr 10, 2025 · active
3
confirmed
Alameda, California
Apr 8, 2025 · active
2
confirmed
Santa Barbara, California
Apr 4, 2025 · resolved
1
confirmed
Ventura, California
Apr 3, 2025 · resolved
1
confirmed
Alameda, California
Apr 2, 2025 · active
1
confirmed
Santa Barbara, California
Mar 21, 2025 · resolved
1
confirmed
Ventura, California
Mar 17, 2025 · resolved
1
confirmed
San Bernardino, California
Mar 11, 2025 · resolved
2
confirmed
San Bernardino, California
Feb 18, 2025 · resolved
2
confirmed
San Bernardino, California
Feb 11, 2025 · active
2
confirmed
San Luis Obispo, California
Feb 1, 2025 · resolved
1
confirmed
San Bernardino, California
Feb 1, 2025 · active
1
confirmed
San Luis Obispo, California
Jan 17, 2025 · resolved
1
confirmed
San Diego, California
Oct 5, 2024 · resolved
1
confirmed
San Diego, California
Sep 30, 2024 · resolved
1
confirmed
Showing the 25 most recent of 26 total alerts.
About Equine Herpesvirus-1 Neurologic
Neurological form of EHV-1 causing paralysis and ataxia
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