West Nile virus activity is on the rise in some northern California counties, according to the Sacramento-Yolo Mosquito and ...

A crow from Walnut Creek has tested positive for West Nile virus (WNV) in Contra Costa County, confirmed the Contra Costa ...

Northern California’s first human West Nile virus case of the year has been confirmed in Butte County, according to local ...

Insecticide will be sprayed from an airplane over a north Modesto community Friday night to combat a growing presence of ...

The Windsor-Essex County Health Unit (WECHU) has reported its first human case of West Nile virus of 2025. That's slightly later than last year, when the first human case appeared in July, according ...

West Nile virus has been identified in a mosquito pool in Ottawa for the first time in 2025. There is one confirmed human ...

An American crow from Walnut Creek is the second bird to test positive for West Nile virus, the Contra Costa Mosquito and ...

An American crow from Walnut Creek is the second bird to test positive for West Nile virus, the Contra Costa Mosquito and Vector Control District said Friday.