- CDC: West Nile Virus
Offers general overview, local outbreak information, symptoms, and prevention issues as well as professional information including clinical guidance, surveillance, statistics, and virology.
- Pennsylvania's West Nile Virus Surveillance Program
How to reduce risk, explanation of the virus, fact sheets, symptoms,and more.
- USDA: West Nile Virus: Protecting Your Horses
Provides clinical signs of West Nile virus infection in horses, vaccination information, and tips for reducing mosquito breeding sites.
- West Nile Virus Maps
Weekly national and state maps showing reported distribution of the West Nile virus in birds, humans, mosquitoes, and sentinel flocks, as well as veterinary reports.
Directory of articles, news, facts, and background.