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) The daily number of genomic sequences of SARS-CoV-2 VOCs from February 2021 to March 2023. (B) The summary of viral copies of all samples, expressed as log10(viral copies per milliliter). (C) The summary of viral copies aggregated by month. The data gap in October 2021 is because we were unable to conduct PCR to obtain viral copies during this time.
