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

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

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

BUTTE COUNTY, Calif. — Health officials in Butte County have confirmed the first human case of West Nile Virus (WNV) this ...

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

There has been an increase in West Nile virus activity as more mosquito samples and dead birds have tested positive in recent ...

More signs of West Nile virus have cropped up this summer in Contra Costa County, this time in Knightsen, officials said. A ...

LOS ANGELES — Public health officials on Tuesday said mosquito samples collected in Anaheim and Garden Grove have tested positive for West Nile virus, the first confirmed virus activity this ...

The Windsor-Essex County Health Unit (WECHU) has reported its first human case of West Nile virus of 2025. That's slightly ...

West Nile Virus infections generally fall into three categories. Eight in 10 people are asymptomatic, one in 5 experience mild to moderate symptoms, and less than 1 in 150 develop ...