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Colorado State Veterinarian’s Office
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West Nile virus spreads in Europe and North America
19 clusters · 59 sources · last updated
Latest: Wyoming official confirms West Nile virus in Fremont County horse
In the United States, West Nile virus (WNV) continues to impact equine populations and is increasingly detected in mosquito populations. In Florida, an under-vaccinated 16-year-old Quarter Horse in Indian River County wa