Concerns Continue For West Nile Virus in Colorado

Concerns Continue For West Nile Virus in Colorado

As of September 30, 2025, there have been a total of 1,324 human cases of West Nile virus reported in 42 states this year, according to the Centers for Disease Control and Prevention (CDC). This compares with 1,791 cases for all of 2024, but it’s far below the 9,862 cases reported in 2003—the highest incidence across the past 25 years. Colorado has been particularly hard hit with 235 cases and 12 deaths this year, according …

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West Nile Virus is Back with a Vengeance

West Nile Virus is Back with a Vengeance

The Centers for Disease Control and Prevention has served notice that 47 states and the District of Columbia have confirmed cases of West Nile virus (WNV) in people, birds, or mosquitoes this year. All told, there have been 1,295 cases among humans. California has seen the most—258 cases, with 47 popping up in a single week this month, including 12 fatalities. Texas is second in the country, with 105 cases, but has a higher number …

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