Previous seasonal flu infections and vaccinations may protect us against infection from the highly pathogenic H5N1 bird flu outbreak.

Public health officials have warned that new mutations of bird flu with human flu could have dangerous consequences.

Doctors say the case of a teen left in critical condition shows H5N1 "can cause severe human illness." Mutations in the virus are deepening concerns about the spread of H5N1.

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 virus has spread among dairy cattle, humans and other mammals. But officials say the current public health risk is low.

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

As bird flu infections rise ... the CDC recommends that people stay away from sick or dead birds or other animals, and avoid ...

“The risk to members of the general public who do not have exposure to infected ... Experts say it’s unlikely this specific ...

Wisconsin's first case of H5N1 bird flu ... to people, not from one person to another ‒ which would substantially raise the level of public health alarm. The Louisiana case "does not change ...

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 ...

"Day to day, people do not have to worry about bird flu," he said. Risk of animal-to-human transmission for people who do work closely with sick, potentially sick or dead animals can also be ...