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 second health worker in contact with the Missouri patient who tested positive for bird flu also developed symptoms but wasn ...

News that a person in Missouri contracted H5 bird flu despite having no known contact with infected animals or birds — in other words, no evident route of infection — raises pressing ...

A second health worker who cared for a person hospitalized in Missouri with H5N1 bird flu developed mild respiratory symptoms ...

A second Missouri healthcare worker who had contact with a hospitalized patient infected with bird flu developed mild ...

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

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

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

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 third close contact of a patient in Missouri who was hospitalized with H5N1 bird flu has reported that they also ...

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

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