Overview
- The Centers for Disease Control and Prevention reported on Thursday that 48 human West Nile cases have been confirmed so far this year, including 38 neuroinvasive infections, with activity detected in 23 states and Arizona reporting 32 cases and four deaths.
- Local mosquito control programs have stepped up trapping, pooled testing, sentinel animal monitoring and targeted ground and aerial spraying after early positive detections such as a Pasco County sentinel chicken in April.
- Most people infected with West Nile do not develop symptoms, but nearly 80 percent of reported cases so far are neuroinvasive, and older adults or people with weakened immune systems face the highest risk of severe brain or spinal cord illness.
- Public health agencies are urging simple preventive steps for people spending time outdoors this holiday weekend: use EPA‑registered repellents, repair screens, wear long clothing at dawn and dusk, and remove standing water where mosquitoes breed.
- Experts link the early surge to warm, wet conditions that extended mosquito breeding, raising concern the season could grow worse and underscoring calls for stronger local control funding and accelerated vaccine research.