When it comes to the potential of H5N1 avian flu, otherwise known as bird flu, picking up mutations that may lead to human-to-human spread, that "train has already left the station," warns one infectious disease expert.

H5N1 isn’t going away anytime soon and could become a pandemic. Here are some tips to help you understand your risk

Q&A: From people avoiding wild birds to farmers protecting their animals, Kent State epidemiologist Dr. Tara Smith shares tips on bird flu prevention.

Bird flu has decimated poultry flocks and infected cattle herds. The risk to humans is currently low, but that could easily change as influenza can rapidly change.

Are people at risk for bird flu? How can I protect myself? Bird flu’s risk for the general public is still low, with no signs of p

Bird flu hits Nevada as its effects remain visible at grocery stores. Susanne Rust hated to say it, but she did: “I think the H5N1 bird flu outbreak is going to continue to pest

Cases in avian influenza, better known as bird flu, are continuing to rise nationwide. In New York, the virus has primarily affected geese and raptors. But with one human death reported out of Louisiana,

The detection indicates that distinct forms of the virus known as Type A H5N1 have spilled over from wild birds into cattle at least twice. Experts said it raises new questions about wider spread and the difficulty of controlling infections in animals and the people who work closely with them.

By 1957, scientists had a significantly more sophisticated understanding of influenza, worrying them that a pandemic similar to that of 1918 could easily erupt, killing millions again.