At least eight people may be infected with H5N1 bird flu in Missouri, marking the first cluster of the disease spreading ...

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

Ever since the virus known as H5N1 was identified in dairy cows in March, it’s continued to spread around the country — turning up in 200 herds over at least 14 states.

Earlier this month something concerning happened as avian flu continues to spread among dairy herds. A patient in Missouri tested positive for H5N1, the formal name for the virus. They ...

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 ...

A total of 94 healthcare workers were possibly exposed to the state's first human bird flu case, and the nation's first ...

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

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

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

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

In the absence of PCR testing, infectious disease experts and epidemiologists are anxiously awaiting serology results from ...