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.
The blue, red, and purple boxes represent Domain I, Domain II, and Domain III, respectively. SARS-CoV-2, severe acute respiratory syndrome coronavirus 2; Mpro, main protease.
