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 ...

Colorado’s West Nile season started early this year, with mosquitoes testing positive for the virus in Denver, Boulder and ...

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.

Bird flu was nearly everywhere in the U.S.—in chickens, cows, pet cats and even humans. Cases have gone down, but experts ...

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.

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.