Genetic analysis of a bird flu virus detected in a person in Missouri who didn’t previously have contact with animals offers ...

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 ...

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

A person sickened by bird flu in Missouri was probably an isolated case, federal health officials said Thursday, though they ...

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

The Centers for Disease Control and Prevention said Thursday it has yet to identify “a clear source” of infection in a ...

Health officials say they don’t know how a Missouri person caught bird flu, but they believe it may be a rare instance of a ...

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

Epidemiologists have not yet identified exactly how a person in Missouri contracted bird flu last week, said the U.S. Centers ...