Since it was first detected in the U.S. in 2014, H5N1 avian influenza, commonly known as bird flu, has jumped from wild birds ...

A new nasal spray vaccine could stop bird flu at the door — blocking infection, reducing spread, and helping head off the next pandemic.

Highly pathogenic avian influenza is again spreading through U.S. poultry flocks, but on a smaller scale than past outbreaks. Still, experts warn an uptick in cases could occur this winter. HPAI has ...