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

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

Reports this week of a teen in British Columbia who tested positive for H5 avian influenza has renewed attention on the virus ...

It's not clear how the British Columbia teenager picked up the virus, which has been detected recently in wild birds and ...

Amid an ongoing outbreak of bird flu in American dairy herds and poultry flocks, Canadian officials have announced ...

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

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 ...

The U.S. Centers for Disease Control and Prevention (CDC) on Friday confirmed highly pathogenic form of bird flu in a person ...

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 ...

A second person in Missouri who wasn't exposed to either poultry or dairy cows has been infected with bird flu, U.S. health officials reported Thursday. This person shared a home with a patient ...

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 ...

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 ...