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

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

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

The Centers for Disease Control and Prevention (CDC) has identified mutations in a strain of the avian influenza virus H5N1, ...

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

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

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 patient was infected with the D1.1 genotype of the virus that was recently detected in wild birds and poultry in the ...

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

A severe case of bird flu in Louisiana has led to the discovery of mutations in the H5N1 virus, which may help it bind more ...

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