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.
Root-to-tip regression of a maximum-likelihood (ML) phylogenetic tree of complete genome of D8 genotype strains. The correlation between genetic divergence and sampling time was calculated by R2. The time of the most recent common ancestor was designated by the X intercept.
