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West Nile Virus


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West Nile Virus in Fairfax County

West Nile virus was first detected in Fairfax County in 2000 when a single crow was found to be infected. In 2001, more birds were found infected and in 2002 the virus was found infecting birds, horses, mosquitoes and humans. There were 13 human cases of West Nile virus with one fatality in Fairfax County in 2002, three human cases with no fatalities in 2003, and a single case, which was fatal, in 2004. Fairfax County has implemented an intensive West Nile Virus surveillance program that includes surveillance of mosquitoes, birds, and human cases, as well as laboratory testing for West Nile virus, source reduction (elimination of standing water), larviciding, public education and community outreach.

Mission Statement

The Fairfax County West Nile Surveillance Program aims to minimize the impact of mosquito-borne diseases through countywide surveillance measures together with an integrated approach to mosquito management and control practices which will be primarily targeting those species that have been shown to be the most probable vectors in the County.

Protecting yourself and your Family from West Nile Virus

There are three basic things that you can do to protect yourself and your family: