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 ...

Both patients were dairy workers whose illnesses were mild. Investigators are continuing to evaluate the contacts of a ...

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.

Antibody blood test results expected later this month may help answer a crucial question: Is there human-to-human ...

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

California, the biggest U.S. milk-producing state, on Thursday confirmed two human cases of bird flu in people who had ...

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

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

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

The Missouri case is the only bird flu diagnosis in the United States this year where the person hadn't had direct contact with infected poultry or dairy cattle. The remainder of the 16 people ...