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 ...

Investigators trying to determine how the person caught the virus have not been able to confirm the exact strain of flu.

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 ...

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

The U.S. Department of Agriculture is projecting that egg prices will decrease in the coming months. But experts said that ...

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