West Nile cases hit 143 nationally as CDC data signal the start of peak transmission weeks https://www.medicaldaily.com/west-nile-virus-143-cases-cdc-peak-season-august-2026-477066 CDC surveillance reports 143 West Nile cases nationally through Aug. 4, up from 113 a week earlier, as peak transmission weeks begin. #wellness #westnile #publichealth