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County of Riverside Published August 20

First West Nile Virus Detections Confirmed in Riverside County

First West Nile Virus Detections Confirmed in Riverside County ymachado August 20, 2026 Riverside County Vector Control Program has confirmed its first two detections of West Nile Virus (WNV) in the unincorporated areas of Riverside County for the 2026 mosquito season. These are…