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

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

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

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

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

Experts call for greater testing of contacts of a person who was infected with the H5N1 bird flu strain before the virus ...

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

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

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

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.

Another health care worker who was exposed to a Missouri patient who tested positive for bird flu developed respiratory symptoms but wasn't tested for the flu.

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