During February 7─September 3, 2022, a total of 39 US states experienced outbreaks of highly pathogenic avian influenza A(H5N1) virus in birds from commercial poultry farms and backyard flocks. Among persons exposed to infected birds, highly pathogenic avian influenza A(H5) viral RNA was detected in 1 respiratory specimen from 1 person.
Keywords: United States; bird flu; epidemiology; farms; highly pathogenic avian influenza; influenza; respiratory infections; surveillance systems; viruses; zoonoses.