Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Phylogenetic tree of H3N8 HA1 nucleotide sequence. Bootstrap values obtained after 1000 replicates as shown at the major nodes. Phylogenetic tree is rooted to A/eq/Miami/63. Accession numbers for the genes reported in the manuscript are listed in Supplementary Information Table S1. Branch colours: Black = Pre‐divergent; Green = European lineage; Red = American lineage; Pink = American lineage Florida sublineage clade 1; Blue = American lineage Florida sublineage clade 2.
