The CDC just confirmed the first case of severe bird flu in the U.S, and California just declared a state of emergency.

Health officials said the first "severe" case of the H5N1 virus was reported in a human this week, with the person being ...

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

The first severe human case of bird flu in the U.S. has been confirmed by the CDC, bringing the total number of human cases to 61.