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West Nile virus
West Nile virus is a mosquito-borne illness that is present all over the world. It appeared in Canada for the first time in 2001.


West Nile Virus

The West Nile Virus (WNV) was identified in 1937, when it was first isolated in the blood of a patient from the West Nile province of Uganda. The virus is in the same class as the one that causes Japanese encephalitis. It is spread by mosquito bites and is found across the globe. Several bird species constitute its animal reservoir. The virus has been associated with numerous outbreaks in several African, Asian, Middle-Eastern, and European countries.
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