Avian influenza H5N1 infection in humans has spread to seven U.S. states, growing from 46 cases last week to 52 cases this week.

Testing showed a Missouri bird flu patient did not infect the people around them, federal health officials said Thursday, a sign that the virus is not spreading among humans in a dreaded scenario ...

NBC Universal, Inc. The bird flu virus hasn’t yet spread from person to person, the Centers for Disease Control and ...

Oregon confirms its first human bird flu case, the latest in dozens of cases in the U.S. this year. Experts discuss the ...

Blood tests of several people who were in contact with a patient in Missouri who caught H5N1 bird flu without any known exposure to infected animals reveal that at least one of them — a person ...

By Apoorva Mandavilli and Emily Anthes A Missouri resident who shared a home with a patient hospitalized with bird flu in August was also infected with the virus, federal officials reported on ...

As H5N1 bird flu continues to spread wildly among California dairy herds and farmworkers, federal health officials on Thursday offered some relatively good news about Missouri: The wily avian ...

Blood testing conducted by the Centers for Disease Control and Prevention has confirmed that one person in Missouri with no known exposure to cattle or poultry contracted H5N1 bird flu in August ...

Federal health officials announced Thursday that a Missouri resident infected with bird flu did not spread the virus to others, alleviating concerns about potential human-to-human transmission during ...

H5N1, or bird flu, has been spreading among farm animals, wild birds and other animals and has infected 31 people, mostly farmworkers, in the U.S. After the Missouri patient fell ill, several ...