For the first time, the U.S. Department of Agriculture has confirmed the presence of H5N1 avian influenza in rats.

More than 160 million wild and domestic birds have been infected with bird flu across the United States since 2022.

Since 2021, experts have seen bird flu — also called H5 influenza or highly pathogenic avian influenza (HPAI) — spreading "fairly quickly" across the wild and domestic bird populations and, now, among ...

USDA conditionally licensed an Avian Flu vaccine for chickens to be used during outbreaks that impact egg prices.