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.
Estimated monthly infection prevalence from June to September 2023 based on pooled sample testing. Bars indicate the Bayesian point estimates of prevalence, and error bars represent 95% credible intervals. Different letters indicate statistically significant differences. October and November are excluded because all pools tested positive during those months, resulting in extremely wide credible intervals and unreliable estimates.
