West Nile virus cases spread across 32 states as officials urge bite prevention

The CDC has recorded 222 human cases of West Nile virus this year, with the highest numbers in Arizona, Texas, and California, and New York City reported its first case this week. Most infections are asymptomatic or resemble a cold, but rare cases can lead to meningitis, paralysis, or brain swelling. Since no vaccine exists, health experts recommend covering skin and using repellent to avoid mosquito bites.