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

A cluster of healthcare workers has been tested for H5N1 bird flu in what could be the first cases of human-to-human spread of the virus.

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

Seven people in contact with a patient hospitalized with bird flu also developed symptoms, the C.D.C. reported. Some are ...

Four more health-care workers who tended to a person hospitalized with H5N1 bird flu have revealed that they had respiratory ...

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

Testing is ongoing among five health care workers and a household member exposed to the infected person who all came down ...

More than a month after a person in Missouri mysteriously fell ill with H5-type bird flu, investigators in the state are ...

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

The H5N1 bird flu has been spreading widely among wild birds, poultry, cows and a growing number of other animals NBC ...

"Even sporadic cases of human-to-human transmission indicate a big change in the virus and suggest it is exploring new ...

CDC said that four more healthcare workers have revealed that they had respiratory symptoms. These cases have been linked to ...