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. 2021 Apr 23;13(5):742. doi: 10.3390/v13050742

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Assay sensitivity on blinded XPRIZE samples: The set of blinded XPRIZE samples comprised 123 samples with an unknown concentration SARS-CoV-2 Twist synthetic RNAs in water or SARS-CoV-2 ZeptoMetrix particles in phosphate-buffered saline (PBS), nasal sample, or saliva sample. True positive rate (y-axis) is shown for different concentrations (x-axis) across the different matrices. The number of samples tested at each concentration for a sample type is represented by the values above the x-axes.