Figure 1.
Rate of respiratory viruses detected in 2019–2021. (A) Influenza viruses; (B) Parainfluenza viruses; and (C) Coronaviruses.
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.