Mosquitoes spread West Nile virus. Illness ranges from mild to severe.
Protect yourself and your family from mosquito bites to prevent West Nile virus.
Symptoms of West Nile include fever, head and body aches, and more. Illness can be severe.
Infected mosquitoes spread West Nile virus throughout the United States.
West Nile cases occur nationwide. State and territorial health departments report case data.
For Professionals
Learn how to treat and prevent West Nile virus disease.
Learn the clinical signs and symptoms of West Nile virus disease.
- Know what tests to order to diagnose West Nile virus infection.
- Know the cause of West Nile virus disease and how it is transmitted.
- Link to additional information about West Nile virus in the United States.
- Access a clinical training for West Nile virus disease.
- Health departments can use a CDC-created toolkit to communicate about West Nile outbreaks.