A different strain of H5N9 has shown up in U.S. birds before.

This strain of avian influenza emerged in 2022 and brought major losses in the Northern San Joaquin Valley and beyond.

As the highly pathogenic avian influenza outbreak continues, university experts work to develop edible vaccines to protect ...

Avian flu concerns are ramping up further in Weld County, after hens at an egg operation with 1.3 million chickens tested ...

Five birds across LA County tested positive for highly pathogenic avian influenza H5, also known as H5 bird flu, officials said.

This strain of avian influenza emerged in 2022 and brought major losses in the Northern San Joaquin Valley and beyond.

Dozens of migrating birds were found dead or dying at an Amarillo playa lake over the weekend. Avian influenza is suspected.

Avian flu, long associated with birds, continues to surprise scientists as it spreads across species and oceans. After first jumping to dairy cows two years ago, the virus has now infected elephant ...