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

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

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.

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

Federal officials plan to double the stockpile of emergency bird flu vaccines as they identify more people infected with the ...

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

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 companies will use the funds to fill vials and pre-filled syringes with stockpiled vaccine ingredients, aimed at raising ...

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

A cluster of healthcare workers has been tested for H5N1 bird flu in what could be the first cases of human-to-human spread of the virus.