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

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

An American crow in Walnut Creek was found to be the second bird infected with West Nile Virus, according to the Contra Costa ...

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

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

More signs of West Nile virus have cropped up this summer in Contra Costa County, this time in Knightsen, officials said. A group of mosquitoes collected from a trap in Knightsen, a community in ...

Nearly 470 cases of West Nile virus, chikungunya, and dengue have been reported so far this year, according to the European ...

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

A second human case of the West Nile virus of 2025 was reported last week in Shelby County, health officials said Monday.

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 ...