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

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 ...

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 ...

Missouri reported its first human case of the current U.S. outbreak. All other 14 cases nationwide have been livestock ...

Federal officials are still trying to determine how a Missouri resident with no known exposure to bird flu, contracted the ...

The case raises questions about how the person was exposed to the virus. All the previous U.S. infections were among people ...

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

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

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.

The risk to the general public remains low, U.S. Centers for Disease Control and Prevention officials said in a statement NBC ...

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

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