Japanese authorities began culling some 50,000 chickens Sunday after a bird flu outbreak at a farm in the northern Iwate region.

Japanese authorities have started culling about 50,000 chickens on Sunday (Jan 5) following a bird flu outbreak at a farm.

The rise of bird flu across farms in California has raised questions about the virus and its potential threat to humans.

As the seasonal flu picks up, there are even more opportunities for the bird flu to acquire mutations as the different influenza viruses mix.

The Pennsylvania Game Commission and wildlife rehabilitators are studying the deaths of snow geese in eastern Pennsylvania. Here's why ...

A Canadian teen's severe bird flu infection has highlighted growing concerns about the H5N1 virus, commonly known as bird flu ...

The agency says it is looking for red flags, but the risk to the public still remains low. Meanwhile, a Louisiana patient with a severe case of bird flu showed worrying mutations in the samples ...

In coming years, the bird flu may cost billions of dollars more in expenses and losses. Worse, the outbreak poses the threat ...

Most human cases of bird flu in North America have been mild, a fact that’s underscored by a new study of the first 46 ...

So far, the H5N1 virus isn't transmitted between people — but the CDC has found a mutation in a human case "concerning." ...