Symptoms of illness may appear three days to two weeks after an infection, Weld County said last week. Most people show no ...

Most West Nile cases in Colorado happen between July and September, though mosquitoes can live until the first snow or hard ...

Older adults and immunocompromised people can be at higher risk for developing serious illness or death, the Oregon Health Authority said.

Get out the bug spray and be mindful about covering up at dusk and dawn. Mosquitoes infected with West Nile Virus have been ...

Mosquitoes carrying the virus were first identified in Colorado in 2003. That year resulted in the most human cases of West ...

Boulder County Public Health and Weld County both confirmed within two days that there have been the first positive tests of ...

Weld County had 15 reported cases of human West Nile virus, according to the website. The year before reached 52 cases.

The state’s West Nile virus season appears to be ahead of schedule this year, after two more Colorado counties detected the ...

DENVER ( KDVR) — The first trace of the West Nile virus this season was found in Denver through a positive mosquito sample.

Colorado's West Nile virus season is starting a bit early, but experts aren't sure whether a wet spring will translate into a tough year for the mosquito-borne illness.