How Mosquitoes Carry West Nile Virus
Mosquitoes become carriers of West Nile virus when they bite infected birds. The virus circulates in the mosquito’s body and can be passed to humans and animals through subsequent bites. Most infected mosquitoes do not transmit the virus, but a small percentage can spread it during blood meals.
Transmission, Symptoms, and Risk Factors
West Nile virus is primarily spread through mosquito bites, not casual contact. Many people show no symptoms, while others develop fever, body aches, or rash. In rare cases, severe neuroinvasive disease can occur, especially in older adults and people with weakened immune systems. The CDC provides updated data on cases and outbreaks.
Centers for Disease Control and Prevention West Nile Virus page
Prevention and Protection Tips
Reduce exposure by using EPA-registered repellents, wearing long sleeves, and avoiding peak mosquito activity at dawn and dusk. Remove standing water around homes where mosquitoes breed, and install or repair window screens. Community mosquito control programs also help limit the population of carriers.
