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.
(A) A time-resolved maximum likelihood phylogeny of a representative global subsample of 3004 SARS-CoV-2 complete genomes sampled between December 2019 and October 2022 from the GISAID. The variants of concern (VOCs) are denoted by different colour schemes. The figure was generated by the Nextstrain using the data from the GISAID, (B) The global distribution frequencies of VOCs are denoted by different colour schemes over the timespan since SARS-CoV-2’s emergence.
