The H5N1 avian flu is circulating in cows and other mammals. Whether it will make a permanent leap to humans is another ...

H5N1 avian influenza has long been a concerning virus. Since its discovery in 1996 in waterfowl, bird flu has occasionally ...

Here's what we know about human bird flu cases in Colorado, what the state health department says about consuming poultry products and more.

Human bird flu cases tick up; second Colorado poultry farm reports spread Seven cases have been reported in Colorado this month, bringing the total to 11.

Want to know how many human bird flu cases there are in Colorado? Colorado Department of Public Health and Environment has a new tracker.

3 workers at a Weld County, Colorado chicken farm tested positive for bird flu. This is the second chicken farm that has had reported human cases of avian flu.

A new human case of H5 highly pathogenic avian flu has been identified in Colorado, the US Centers for Disease Control and Prevention said Friday.

The three new cases from a second farm in Weld County brought Colorado’s total number of confirmed avian flu cases in humans to 10 — nine cases at two poultry farms and one case from a dairy farm.

It's the largest outbreak of human bird flu infections in U.S. history, and accounts for most of the 11 cases reported to date.

The Colorado Department of Public Health and Environment said Sunday that five human cases of bird flu had been detected in poultry workers believed to have caught the bird flu virus through ...