At the surface, the immune response to a flu virus is simple. Some cells recognize the pathogen and send a signal to the ...

Although the avian flu (H5N1) virus may not be making the news as frequently, it is still working hard behind the scenes, ...

New versions of the H5N1 virus are increasingly adept at spreading. Suggestions to either let it rip in poultry or vaccinate the birds could backfire.

HHS Secretary Robert F. Kennedy Jr. and Secretary of Agriculture Brooke Rollins have expressed interest in letting H5N1 ...

The avian flu virus isolated from a hospitalized teenager in Vancouver has mutations in key areas that could help the virus spread more easily in humans, scientists say. CNN values your feedback 1.

Bird flu is the nonscientific name for avian influenza, a type of flu virus that commonly infects waterfowl, turkeys and other birds. If it stays in birds, the main danger is to poultry.

Bird flu in humans may look similar to a regular flu or upper respiratory infection, says Babcock, or a person may have no obvious symptoms. It can also lead to pneumonia, respiratory failure and ...

H5 bird flu, a type of avian influenza, has infected dozens of people in the U.S., and spread to seven states and Canada this year. As concern grows over whether it could lead to another pandemic ...

How one virus spread from pigs and birds to humans around the globe. And why microbes like the H1N1 flu have become a growing threat.

The bird flu virus is responsible for an ongoing outbreak in dairy cows in the United States. Since March, it has been detected in cows in 11 states, and in wastewater from several others.

When a virus is new, like the 1918 strain of H1N1 and the 2009 H1N1 “swine flu”, it usually kills far more people. One theory is that the immune system can become overwhelmed by the never ...

Influenza A viruses have the capacity to swap genes, and this version of H5N1 has picked up a different neuraminidase gene (the N in a flu virus’ name) than the B3.13 viruses have, Webby said.