Hospital workers reported respiratory symptoms after encountering a Missouri patient with H5N1 who had not been exposed to ...

U.S. health officials have run into obstacles in their efforts to determine whether a Missouri person infected with H5N1 bird ...

The latest developments are highly concerning, as they raise the possibility that the H5N1 virus has evolved the ability to ...

Missouri officials are under growing pressure from national public health experts to pinpoint the source of the state’s first ...

None of the health care workers or other contact have tested positive for avian flu antibodies so far — but could their ...

Chances are low that human-to-human spread of bird flu occurred in a group of people who were exposed to a patient infected ...

In what could be the first cases of bird flu spreading between humans in the United States, a group of potential H5N1 ...

The patient experienced conjunctivitis after contact with infected dairy cattle in the state's Central Valley.

Further testing could confirm whether the patient, who has since recovered, actually had bird flu despite testing positive.

In what could be the first cases of bird flu between humans in the US, a group of potential H5N1 infections in Missouri has now grown to 8.

The CDC said an investigation into a human H5N1 bird flu infection in Missouri has found four additional health care workers ...

At least one household member and six healthcare workers who encountered the index case-patient are being investigated after ...