West Nile virus surges in Southern California, prompting urgent protection steps
West Nile‑carrying mosquitoes are spreading rapidly through Los Angeles and Orange counties, with LA County reporting 27 positive samples and Orange County detecting West Nile in 38 mosquito pools. Nationally, human cases are at a mid-year high not seen since 2004, though California has only one reported human case so far this year. There is no specific treatment; most infections are mild or asymptomatic, but about 1% can progress to neuroinvasive disease, which can be severe and sometimes fatal. Prevention focuses on reducing breeding sites and avoiding bites: use EPA‑recommended repellents (DEET, IR3535, oil of lemon eucalyptus, or Picaridin), wear long sleeves/pants at dawn/dusk, remove standing water, maintain screens, and report dead birds or large breeding sites to local vector control.
