Boulder County Public Health, Weld County and the city and county of Broomfield have confirmed within two days that there ...

Mosquitoes in two Weld County zones have tested positive for West Nile Virus, though no human cases have been reported yet.

Boulder County Public Health confirmed that, last week, mosquitoes trapped on the east side of Niwot tested positive for West ...

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

The U.S. is having its worst year for measles spread in more than three decades, with a total of 1,288 cases nationally and ...

Stanislaus County Public Health has confirmed that a resident in Stanislaus County has been infected with West Nile Virus ...