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 ...

In a disclosure that can't eliminate the possibility that bird flu may have spread from one human to another for the first ...

A patient in Missouri who was hospitalized after an infection with bird flu had the H5N1 strain of the virus, the US Centers ...

Health officials on Thursday said they don’t know how a Missouri person caught bird flu but believe it may be a rare instance ...

In a case that continues to confound scientists, U.S. health officials said Thursday that they still don't know how a ...

WASHINGTON — Public health officials are still trying to determine how a Missouri resident contracted bird flu without having ...

An individual from Missouri with no known exposure to risk factors got infected, and a close contact developed symptoms but ...

A close contact of a Missouri resident identified as having a human case of the H5N1 avian flu also became sick around the ...

The Centers for Disease Control and Prevention has picked five lab partners to develop a test for avian influenza A (H5N1) — ...

A week after an unusual human case of H5 avian influenza was reported in Missouri, many questions remain. The latest on ...

On Monday state officials announced they had completed testing on all 95 licensed farms in Massachusetts that have dairy ...