Fig. 2.
a. Structural representation of COVID-19 virus (SARS-CoV-2) and b. General information for COVID-19
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.