Westchester County health officials announced Tuesday that a Yonkers resident is the county’s first confirmed human West Nile virus case of 2026. The infection was traced to a bite from a Culex quinquefasciatus mosquito.
The department said the diagnosis was made after the patient presented symptoms consistent with West Nile infection and laboratory testing confirmed the virus. The patient’s condition is being monitored, and no further details about severity or treatment have been released.
West Nile virus is a mosquito‑borne illness that can cause fever, headache, body aches, and, in rare cases, neurological complications. The Culex quinquefasciatus species is one of several mosquitoes known to transmit the virus in the northeastern United States. Health officials note that the virus circulates among birds and mosquitoes each summer, and human cases are identified through ongoing surveillance.
Westchester County tracks West Nile activity each year, testing mosquito pools and reporting any human infections to state and federal agencies. The 2026 case adds to the county’s annual surveillance data, which guides public‑health messaging on personal protection measures such as using insect repellent, wearing long sleeves, and eliminating standing water where mosquitoes breed.
Residents of Yonkers and the broader Westchester area are encouraged to remain vigilant during the peak mosquito season, which typically runs from late spring through early fall. The health department will continue to monitor mosquito populations and issue updates as needed.