Maryland’s attorney general and 19 other state officials argue that state legislatures should retain the authority to redraw ...

Severe weather will impact the U.S., with tornadoes, flooding, and icy conditions affecting regions from Texas to the East ...

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.

Tiny genetic alterations could help the bird flu virus enter cells in the upper respiratory tract, the C.D.C. said. But there ...

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

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 ...

Storms across both the Western and Southern United States threaten to disrupt flights as millions of holiday travelers ...

An investigation by KFF Health News reveals key problems in the U.S. response to bird flu, including deference to the farm ...