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.
3D plot of nonlinear-lagged association between wastewater viral signals and relative risk of COVID-19 hospitalizations for pre-Omicron period(left side), and Omicron period(right side).