A little-known variant of bird flu has evolved to become better adapted to infecting people and could pose a pandemic threat to humans, a team of researchers has warned.

Almost a year ago, the H5N1 strain of bird flu was discovered in dairy cows for the first time. Since then, there have been confirmed cases in at least 976 herds across 17 states, including 13 herds ...

The highly pathogenic bird flu virus that has surfaced in a Wisconsin dairy herd is not a lingering ember from earlier outbreaks in cattle. It is a fresh jump from wildlife into livestock, a new ...

Bird flu (H5N1) confirmed in a Jefferson County poultry flock. Risk to the public is low; officials urge biosecurity and avoiding sick or dead birds.

Officials say another case of avian influenza, also known as bird flu, has been detected, this time in a northwest Iowa flock ...

Bird flu is spreading in across the U.S. this spring, impacting countless birds and raising concerns for farmers. Here's how to protect your animals.

A line of Holstein dairy cows feed through a fence at a dairy farm in Idaho on March 11, 2009. automation A second person in the United States has been infected with bird flu, health officials said ...