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. 2021 Nov 30:ciab938. doi: 10.1093/cid/ciab938

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© The Author(s) 2021. Published by Oxford University Press for the Infectious Diseases Society of America. All rights reserved. For permissions, e-mail: journals.permissions@oup.com.

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Figure 1. — Scatterplot of MSD spike (A, Au/mL), Roche spike (B, U/mL), and MSD RBD (C, Au/mL) antibody concentrations, with cubic spline curves (and 95% confidence intervals). For the Roche spike assay, the maximum value of 2500 U/L occurred in 35 (30%) samples of the short interval group and 60 (88%) samples of the long interval group. Abbreviations: MSD, Meso scale discovery; RBD, receptor binding domain.