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

A routine flu screening in late summer found the H5N1 virus in a Missouri patient. Unlike the other reported cases, this ...

A routine flu screening in late summer found the H5N1 virus in a Missouri patient. Unlike the other reported cases of avian ...

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

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

California health officials yesterday announced the state's second H5N1 avian flu infection in a dairy farm worker who had no ...

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

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

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 ...

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

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