The new study is more evidence that the official U.S. tally of confirmed human bird flu infections — 68 in the last year — is likely a significant undercount, said Dr. Gregory Gray, an infectious ...

This week, for the first time in Ohio history, a man living a little more than an hour northwest of Dayton tested positive for bird flu.

A new study shows that bird flu has silently spread from animals to some veterinarians and the Denver health department ...

Egg farms have invested millions into biosecurity, but their efforts have not been enough to contain an outbreak that began ...

A case of bird flu in a wild goose was detected this week in Boulder County, officials said, adding the detection was a good ...

A new variant of the bird flu has led to an infection in a dairy worker in Nevada in the US, marking it the first human case ...

While a pandemic is not inevitable, the spread of the bird flu virus, also known as H5N1, has surpassed worrisome milestones ...

We talked to experts about where the science is on risks to humans and how the virus is messing with the food supply.

When it comes to the potential of H5N1 avian flu picking up mutations that might lead to human-to-human spread, that "train has already left the station," warns 1 infectious disease expert.