an illness caused by a chiefly mosquito-borne virus of the genus Flavivirus, characterized in a small percentage of infected persons by fever, headache, muscle weakness, and sometimes encephalitis or meningitis.
the virus that causes this illness.
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How to use West Nile virus in a sentence
West Nile virus is an infectious disease spread by mosquitoes that have fed on infected birds.West Nile Virus and How to Identify, Avoid, and Treat It | Nina Strochlic | August 19, 2012 | THE DAILY BEAST
Scientific definitions for West Nile virus
An infectious disease caused by a virus of the genus Flavivirus, occurring in Africa, Asia, the Mediterranean, and parts of North America. The infection is transmitted by a mosquito and can cause mild illness as well as severe, sometimes fatal encephalitis and meningitis.
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