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

Another health care worker who was exposed to a Missouri patient who tested positive for bird flu developed respiratory symptoms but wasn't tested for the flu.

In what could be the first cases of bird flu between humans in the US, a group of potential H5N1 infections in Missouri has now grown to 8.

The latest human case of bird flu in the U.S. occurred in a patient with no reported exposure to affected animals, sparking ...

Health authorities in the US are studying seven people who developed influenza symptoms after being exposed to a Missouri ...

Three government agencies—the FDA, the CDC, and the U.S. Department of Agriculture—share responsibility for the bird-flu ...

Marrazzo became the first new director of the National Institute of Allergy and Infectious Diseases in decades, taking over a ...

An emergency ruling is now in effect in Missouri, targeting the state’s high maternal mortality rate. An emergency ruling is ...