- 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. - WestNileFever.com
- Directory of articles, news, facts, and background.
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