A new bird flu mutation of H5N1 has been discovered in a patient in the US state of Louisiana. Public health officials are concerned the new strain may rapidly develop, increasing its ability to ...

PORTLAND, Ore. (AP) — An Oregon house cat died after eating pet food that tested positive for bird flu, Oregon authorities said, prompting a recall of raw frozen pet food that was sold nationwide.

Omaha's Henry Doorly Zoo has closed its aviary "out of an abundance of caution" after multiple confirmed cases of highly ...

A genetic analysis suggests the bird flu virus mutated inside a Louisiana patient who contracted the nation’s first severe ...

In fact, California has been in a Tree Mortality State of Emergency since Oct. 30, 2015. It was declared by Gov. Jerry Brown ...

Here’s what to know about the United States’ first confirmed severe case of H5N1 avian influenza—and how to protect yourself.

Washington: The bird flu virus found in a severely ill patient hospitalized in the United States has mutated to become better ...

Health experts said while the new finding is concerning, it is not a cause for alarm as the virus has been causing sporadic, ...

The CDC said Thursday its analysis of samples from a Louisiana patient with bird flu showed mutations not seen in samples ...

The virus in the first severe human bird flu case in the U.S. was found to have mutated. Newsweek's live blog is closed.

The ongoing spread of bird flu in the United States has alarmed experts -- not just because of human cases causing severe ...

As the CDC is tracking mutations in the bird flu virus that may make it easier for the infection to be spread from person to ...