Influenza A virus or IAV is the only species of the genus Alphainfluenzavirus of the virus family Orthomyxoviridae. It is a pathogen with strains that infect birds and some mammals, as well as causing seasonal flu in humans. From Wikipedia
A three-year-old girl in Mexico has died from H5N1, while France’s health authority advises pre-pandemic vaccination for at-risk groups due to rising outbreaks.