San Ramon has reported its first case of West Nile virus in 2025, confirmed on July 21 by the Contra Costa Mosquito and Vector Control District. The virus was found in a California scrub jay, making it the first infected bird detected in Contra Costa County this year. West Nile virus activity in birds often signals an increased risk to humans, and similar reports have already emerged from neighboring Alameda and Santa Clara counties in recent weeks.
San Ramon has reported its first case of West Nile virus in 2025, confirmed on July 21 by the Contra Costa Mosquito and Vector Control District. The virus was found in a California scrub jay, making it the first infected bird detected in Contra Costa County this year. West Nile virus activity in birds often signals an increased risk to humans, and similar reports have already emerged from neighboring Alameda and Santa Clara counties in recent weeks.