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

The Centers for Disease Control and Prevention should have results later this month that provide more insight into how a ...

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

Chances are low that human-to-human spread of bird flu occurred in a group of people who were exposed to a patient infected ...

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

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

Four additional healthcare workers in Missouri who came in contact with a hospitalized bird flu patient developed mild ...

The mystery continues over how a Missouri man came down with the bird flu -- without having any animal contact.  Experts say ...

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 ...

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

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