Nearly 119,000 birds have been culled at a farm in California after a bird flu called H5N9 was detected among the poultry.
A new strain of highly pathogenic bird flu (H5N9), which has never been seen in the United States before, was recently discovered on a duck farm in ...
The first U.S. H5N9 outbreak has raised concerns as scientists warn of evolving bird flu risks—here's what you need to know about the symptoms.