Archive · 13 Sep 2025
West Nile Virus Cases Surge Across the United States
West Nile virus is spreading in the US, with many people getting sick.
This virus spreads when mosquitoes bite people.
Most people won't feel sick, but some get a fever, headache, and muscle aches.
The mosquito season is longer now because it's getting warmer.
Doctors say to use bug spray, wear long sleeves, and get rid of standing water to avoid getting bitten by infected mosquitoes.
Some cases are serious and impact the brain.
The season for this virus may not be over.
Over 750 West Nile virus cases reported across 40 states.
Nearly 500 cases are neuroinvasive, affecting the brain.
The virus spreads through mosquito bites.
Symptoms can include fever, headache, and muscle aches.
Health officials warn the mosquito season may not be over yet.
- Who
- People in the United States
- What
- Surge in West Nile Virus cases
- When
- Ongoing, with cases reported this year
- Where
- Across 40 states in the United States
- Why
- Spread by infected mosquitoes; mosquito season is extended due to global warming
- Reported Cases
- More than 750 human cases
- States Affected
- 40
- Neuroinvasive Cases
- Nearly 500
- Transmission Method
- Mosquito bites
- Incubation Period
- 2 to 6 days
- Symptoms
- Fever, headache, muscle aches, nausea