West Nile Cases Reach 48 Nationwide, Earliest U.S. Surge Since 2004
Updated
Updated · Los Angeles Times · Jul 8
West Nile Cases Reach 48 Nationwide, Earliest U.S. Surge Since 2004
3 articles · Updated · Los Angeles Times · Jul 8
Summary
48 human West Nile cases had been reported nationwide by June 30, including 38 neuroinvasive infections — the highest midyear tally since 2004, with Southern California seeing a rapid early-season spread.
38 virus-positive mosquito samples have been detected in Los Angeles County vector districts so far, versus a five-year average of about four at this point; cases first appeared there in May and now span 27 locations.
38 infected mosquito pools have also been found in Orange County, up from four in all of last year, with detections now spread across 10 cities after the first 2026 finding in Newport Beach on June 2.
1 California human case has been confirmed — a Long Beach resident hospitalized with neuroinvasive illness — underscoring the risk as about 1% of infections turn severe and roughly 1 in 10 severe cases prove fatal.
Officials say there is no specific treatment, making prevention critical: use DEET or similar repellents, avoid dusk-to-dawn exposure, and remove standing water where mosquitoes breed.