West Nile Virus Infiltrates the Upper 48; EEE Sprinkled Throughout

Every state in the 48 contiguous United States has now experienced a taste of West Nile virus (WNV) since it first was detected in the Western Hemisphere in 1999. Having their first encounters with West Nile virus this year were Nevada (WNV found in birds, mosquitoes, horses, and humans) and Oregon (in birds and horses).

By Aug. 26, the USDA had reported 351 equine cases in 28 states.

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