FIG. 5.
Maximum-likelihood phylogenetic tree of spike gene nucleotide sequences of HCoV-OC43 and several BCoV strains for which the date of isolation was known.
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.