Public health experts are urging vigilance amid recent reports of severe bird flu cases in two North American patients.

Previous seasonal flu infections and vaccinations may protect us against infection from the highly pathogenic H5N1 bird flu outbreak.

Public health officials have warned that new mutations of bird flu with human flu could have dangerous consequences.

Researchers identify 46 mild cases of avian influenza A(H5N1) in U.S. poultry and dairy workers, highlighting low PPE ...