H5N1 Bird Flu Archives
H5N1 bird flu updates: Stories on this page include the risk of avian flu transmission to humans, what would be needed for wide availability of a H5N1 vaccine, and concerns from scientists about possible genetic mutations of the virus. Avian flu has a long history in poultry, but its mutation and transmission to other species has raised scientific alarm in recent years. Human infection, first reported in 2021, remains rare, but an outbreak of avian flu in dairy cattle led to an infected farm worker in