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.

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

Donald Trump smiled wide in front of cheering supporters after millions of Americans went to the polls, choosing the divisive ...

Exclusive reporting reveals how the United States lost track of a virus that could cause the next pandemic. Problems like the ...

At least 61 people in the US have contracted bird flu amid outbreaks in poultry and dairy cows. What are the symptoms? What ...

Learn why humans may be at low risk, but cattle are highly susceptible to a recently emerged genotype that is not yet well ...

At baseline, bird flu is usually severe in humans. Of the 863 reported H5N1 bird flu cases reported worldwide between 2003 ...

As the bird flu virus moved into cows and people, sluggish federal action, deference to industry and neglect for worker ...

The CDC confirms the country's first severe human case of bird flu in Louisiana, while California declares a state of ...

Bird flu, while rare in humans, can cause symptoms ranging from mild fever to severe pneumonia. It spreads via contact with infected birds or surfaces.

H5N1 usually spreads to people through contact with infected or dead birds, as with the Louisiana patient. Currently, there ...