Orange County reports surge in West Nile virus cases
Orange County has reported 36 human West Nile virus cases through Sept. 24, 2026, compared with one at the same point in 2025, while the state lists 147 cases and 10 deaths across 21 counties as of Sept. 18. Mosquito testing in the vector control district found 718 positive nets this year versus 70 last year, and officials scheduled ultra-low-volume adult mosquito spraying in several cities. The county lists no official deaths, although a family reports an Anaheim man died after infection and that death is not yet in county totals. Older adults and people with chronic conditions remain at higher risk.
Orange County reports 36 West Nile virus cases as of Sept. 24.
Context
West Nile virus activity in California has risen this year. County and state case counts…
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