An official website of the United States government
Here’s how you know
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.
... for COVID-19, the disease caused by the SARS-CoV-2 coronavirus, are the only authorized or ... 30. PMID: 33798667 ; PMCID: PMC8008785 .
Microscopic image of SARS-CoV-2, the virus that causes COVID-19. ...