Fig. 2.
AvCoV S1 gene sequences retrieved from GenBank and classified by (a) known sampling year, (b) unknown sampling year, and (c) known sampling year and isolation source.
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.