Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

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.

View full-text article in PMC

. 2021 Sep 17;8(11):ofab464. doi: 10.1093/ofid/ofab464

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2021. Published by Oxford University Press on behalf of Infectious Diseases Society of America.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

PMC Copyright notice

Figure 2. — Comparison of viral loads in symptomatic (n = 124) vs presymptomatic (n = 48) positive and inconclusive samples. Cycle thresholds for samples (each represented by 1 dot) tested using our protocol with nucleic acid extraction (before November 18) are shown here. Complete data are shown in Supplementary Figure 6. Box plots show the median values and 25th and 75th percentiles, with vertical lines demonstrating the range of values. Abbreviations: Ct, cycle threshold; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.