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.
Kaplan-Meier estimate of probability of a positive test for SARS-CoV-2 in saliva direct and nasal VTM specimens over time in days since symptom onset for the longitudinal cohort. Dashed lines indicate median survival times.
