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 ...

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

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

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

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

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.

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

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

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

A Missouri resident has tested positive for bird flu even though there is no evidence the person came into contact with an animal infected with the virus, the Centers for Disease Control and ...