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. 2023 Jun 22;11(4):e03234-22. doi: 10.1128/spectrum.03234-22

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Copyright © 2023 Sulaeman et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license.

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FIG 3 — Numeric output of specimens tested S+/NC+ on either or both platforms for detection of seroreactivity resulting from prior SARS-CoV-2 infection (n = 1057). (A) Numeric outputs of the two S assays. Gray lines at 0.8 and 1 denote manufacturers’ cutoffs for the Roche and Ortho S assays, respectively. (B) Numeric outputs of the two NC assays. Gray lines at 1 on both axes denote manufacturers’ cutoffs for the respective assays. Blue marks denote S+/NC+ reactive samples on both platforms, yellow marks S+/NC+ on Ortho only, and red marks S+/NC+ on Roche only.