Highly pathogenic avian influenza, or HPAI, has been detected on commercial farms in California and other parts of the U.S. The most recent outbreak of the highly transmissible strain of bird flu ...

The biopharmaceutical giant is developing the vaccine as a hedge against future widespread human infection in the U.S. Only 67 human cases of H5N1 avian influenza have been reported nationwide ...

But that doesn’t mean an H5N1 avian influenza pandemic isn’t possible ... Administration and HHS,” outgoing HHS Secretary Xavier Becerra said in a Jan. 17 news release.