The convergence of multiple flu strains in one animal can allow new virus strains to form—just as they did in past pandemics.

With cold and flu season approaching, it's worth knowing about another virus out there-albeit extremely rare: bird flu. Like ...

With the approach of fall and cooler weather across the United States, officials say the risk posed by the H5N1 bird flu ...

This is where we are with bird flu at the moment: the awkward space between watchful waiting and all-out panic mode. The ...

A person in Missouri is the United States’ first case of H5 avian influenza without a known exposure to a sick animal, the US ...

A close contact of someone with bird flu became ill on the same day, the C.D.C. reported. But the second person was not ...

The patient from Missouri has recovered, but health officials are still investigating how they became infected.

A person in the state of Missouri has become the first in the United States to test positive for bird flu without a known ...

So far, there have been 14 human cases of bird flu this year. All the patients — except the one from Missouri — had been linked to sick dairy cows or poultry.

A case of bird flu has been confirmed in a Missouri resident who had no known contact with dairy cows, poultry or wil ...

That  human case of A(H5) avian flu in Missouri that had no known contact with poultry or other animals has been confirmed by the U.S. Centers for Disease ...

So far, there have been 14 human cases of bird flu this year. All the patients — except the one from Missouri — had been ...