America is heading into an even higher-risk period as the seasonal flu begins to circulate. This also raises a question of ...

The CDC said Thursday its analysis of samples from a Louisiana patient with bird flu showed mutations not seen in samples ...

The virus in the first severe human bird flu case in the U.S. was found to have mutated. Newsweek's live blog is closed.

The CDC has confirmed a total of 66 human cases of bird flu across the United States as of Friday, although the number is ...

This year's winter COVID-19 wave is off to a late start, and experts expect cases to keep rising. Here's what to know.

COVID-19 cases are back on the rise nationally, according to the latest trend data from the Centers for Disease Control and Prevention. CDC data shows an increase in weekly test positivity and a ...

The ongoing spread of bird flu in the United States has alarmed experts -- not just because of human cases causing severe ...

A cat in Oregon died from bird flu, which was linked to contaminated pet food, prompting a nationwide recall. Experts warn ...

The bird flu virus found in a severely ill patient hospitalized in the United States has mutated to become better adapted to ...

Scientists are issuing warnings after a bird flu patient showed mutations that could increase the transmission of the virus.

A genetic analysis suggests the bird flu virus mutated inside a Louisiana patient who contracted the first severe case of the ...