On February 5, the US Department of Agriculture said dairy cattle in the United States had tested positive for a particular strain of bird flu that was not previously found in cows.

With so much H5N1 circulating in the U.S., scientists worry we are a few mutations away from a potential human pandemic.

Bird flu continues to spread to farm animals, raising concerns about whether it's safe to drink milk or eat beef, eggs, and ...

The USDA has issued a conditional license for an avian flu vaccine, aiming to control the outbreak affecting poultry and egg prices ...

A report by the Centers for Disease Control and Prevention investigation found evidence of H5 bird flu infection in three US ...

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Another spillover of the H5N1 bird flu virus from wild birds to dairy cattle appears to have occurred, this time in Arizona.

Avian influenza has been detected in milk from a dairy herd in Maricopa County, according to the Arizona Department of Agriculture.

A sample of milk from a herd of dairy cows in Maricopa County has tested positive for H5N1 avian influenza, or bird flu, according to the Arizona Department of Agriculture.

Yahoo News provides the latest updates on the spread of bird flu in the U.S. and its effect on rising egg prices and shortages.

Bird flu has been detected in a wild merganser collected from Milwaukee County last week, the DNR Says. Public health ...