Emerging Novel Reassortant Influenza A(H5N6) Viruses in Poultry and Humans, China, 2021

A novel highly pathogenic avian influenza A(H5N6) clade virus was isolated from a poultry market in China that a person with a confirmed case had visited. Most genes of the avian and human H5N6 isolates were closely related. The virus also exhibited distinct antigenicity to the Re-11 vaccine strain.