The H5N1 avian flu is circulating in cows and other mammals. Whether it will make a permanent leap to humans is another ...

H5N1 avian influenza has long been a concerning virus. Since its discovery in 1996 in waterfowl, bird flu has occasionally ...

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.

The current strain of bird flu circulating among mammals in the United States may have evolved to infect humans through respiratory infection, meaning it is a step closer to developing human-to ...

Scientists always knew a deadly virus was going to jump from animals to humans: COVID was not the first time it has happened, ...

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

Bird flu appears to be on the move. A particularly nasty strain of the H5N1 virus is currently causing the worst outbreak of the disease among birds since it was first identified in China in 1996 ...

Experts warn that this development provides H5N1, the strain responsible for the avian flu, an opportunity to further adapt to humans. ... expressed concern about the evolving situation.

The Clades of H5N1. An important aspect of characterizing the H5N1 threat is understanding that this strain of influenza A is not monolithic but composed of multiple different clades, or subtypes ...

US officials are investigating the appearance of a strain of bird flu identified in the US for the first time, a worrying sign that the virus is evolving in ways that could make it harder to contain.

A highly contagious and lethal bird flu strain is spreading across parts of the U.S. Bird flu is an increasing threat to ... We know that this virus has been evolving over the past handful ...