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

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

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

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

Seven people fell ill with flu-like symptoms after contact with someone infected with H5N1, raising fears that the virus has ...

Dhillon is an instructor in the Division of Global Health Equity at Brigham and Women’s Hospital and Harvard Medical School.

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

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

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

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

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

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