The concerning bird flu outbreak that has spread to four humans so far as it expands quickly in the U.S. has jumped to dozens ...

Zoonotic transmission of avian influenza in the U.S. prompts worry as virus reaches cats and dogs in multiple states. A highly infectious type of avian influenza, commonly known as bird flu, has ...

Bird flu is continuing to spread in animals across the United States more than a year after ... This is believed to be the first instance of mammal to human spread of the H5N1 strain.

Health officials continue to monitor the spread of bird flu in Washington state ... keep the virus from jumping from birds to mammals. That's why state agencies and health researchers like ...

For now, bird flu doesn't easily infect humans and doesn't spread ... mammals it infects," Adalja said, "the more chances it has to adapt to mammals." More than 166 million birds across all 50 ...

Gavin Newsom declared a state of emergency Wednesday ... to learn about the multiple ways the (bird flu) virus is being spread through our domestic species," he said. In December, the USDA ...