Phylogenetic relationships of recently diverged A/goose/Guangdong /1/1996 (Gs/GD/96)-like H5 hemagglutinin (HA) genes. A maximum likelihood tree of 242 HA nucleotide sequences from Gs/GD/96 lineage of HPAI H5 viruses was constructed with 10 000 local support bootstraps (above branches) using FastTree2 (GTR+GAMMA) and rooted to Gs/GD/96. Selected sequences are representative of all clades to render a condensed but accurate phylogenetic topology while including viruses from diverse countries, vaccine candidates, and human cases. All viruses are A(H5N1) unless labeled otherwise. Newly designated clades are underlined. Collapsed clades indicate viruses that have not been detected since 2012 or earlier. Scale bar denotes nucleotide substitutions per site. Sequence accession numbers are provided in Supplementary Data S2.