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West Nile Virus
Diseases and Conditions

West Nile Virus (WNV) is a viral disease transmitted by mosquitoes which can infect humans, birds, horses, and some other animals.

Although 80% of infected individuals don’t have any symptoms, the other 20% frequently present with just fever and viral symptoms. WNV may result in more severe CNS involvement including meningitis, encephalitis & poliomyelitis.

Policy & Guidance

WNV Maps

Specific Resources

Reporting

Publications

Related Webpages

Other Resources



This page last updated on March 17th, 2009.
Content last reviewed on March 1st, 2009.