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Wildlife Information
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What is West Nile Virus?
West Nile virus (WNV) is a mosquito-borne virus of birds that also causes illness and death in horses and humans. West Nile virus was first identified in the United States in 1999 in New York City and subsequently spread to all 48 contiguous states by 2004. Transmission is seasonal with the majority of cases in Wyoming occurring in the late summer.
West Nile Virus Information
