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West Nile Virus

URL of this page: http://www.nlm.nih.gov/medlineplus/westnilevirus.html

Also called: Also called: WNV

West Nile virus (WNV) is an infectious disease that first appeared in the United States in 1999. Infected mosquitoes spread the virus that causes it. People who contract WNV usually have no symptoms or mild symptoms. Those with symptoms may have a fever, headache, body aches, skin rash or swollen lymph glands.

If West Nile virus enters the brain, however, it can be deadly. It may cause inflammation of the brain, called encephalitis, or inflammation of the tissue that surrounds the brain and spinal cord, called meningitis.

Older people are most at risk. There are no specific vaccines or treatments for human WNV disease. The easiest and best way to avoid WNV is to prevent mosquito bites:

National Institute of Allergy and Infectious Diseases

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The primary NIH organization for research on West Nile Virus is the National Institute of Allergy and Infectious Diseases - http://www.niaid.nih.gov/

West Nile Virus - Multiple Languages - http://www.nlm.nih.gov/medlineplus/languages/westnilevirus.html

Date last updated: August 19 2008
Topic last reviewed: June 24 2008