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.

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

Heat probably played a role in at least four cases of bird flu in poultry workers confirmed by U.S. health officials Sunday — the first cases in poultry workers in two years.

For months, bird flu was seemingly everywhere in the U.S.: news headlines reported the highly pathogenic H5N1 avian influenza ...

Four cases of avian flu have been confirmed in poultry workers at a farm in northeast Colorado, with an additional presumed case pending confirmation from the Centers for Disease Control and ...

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.

There are now 10 human cases of avian flu in the state, according to the Colorado Department of Public Health and Environment, making it the largest outbreak of human bird flu infections in U.S ...

U.S. cases of bird flu have been relatively mild and limited to farm workers who handled sick animals – a sign the virus may not be well suited to infecting humans in its current state.

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.

COLORADO SPRINGS, Colo. (KRDO) – There are now ten confirmed human cases of avian flu in Colorado, making it the largest outbreak of the virus in U.S. history, according to state health officials.