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Year's First 2 Human Cases Of West Nile Virus Confirmed In Bay Area
Health officials said one resident was hospitalized and both cases are unrelated, while mosquito treatments are planned to curb further spread.
On Wednesday, the Santa Clara County Public Health Department announced the Bay Area's first two human cases of West Nile Virus for 2026, with both adults recovering at home after medical treatment.
Because both individuals traveled during the virus's incubation period, Dr. Krishna Surasi, communicable disease controller and assistant health officer, said officials have not determined if they were infected locally.
The Santa Clara County Mosquito and Vector Control District detected West Nile virus-positive mosquitoes for the first time this year; the CDC reports fewer than 1% of cases develop severe neurological illness.
Jeremy Shannon, assistant manager of the Santa Clara County Mosquito and Vector Control District, announced crews will conduct targeted treatments, with officials notifying communities 48-hours before abatement starts.
Surasi urged residents to use EPA-registered repellents and remove standing water, stating, "Unfortunately, there is no vaccine that prevents West Nile virus.