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. 2021 Aug 31:aqab092. doi: 10.1093/ajcp/aqab092

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© American Society for Clinical Pathology, 2021. All rights reserved.For permissions, please e-mail: journals.permissions@oup.com

This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model)

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Analytic measurement range of the Elecsys anti–SARS-CoV-2 spike protein antibody (S-Ab) assay. All S-Ab measurements were performed in replicates (error bars shown) and the 95% confidence interval of the linear regression slope is 0.96 to 1.00; y = 0.98x – 1.59; r² = 0.999. S-Ab, spike protein antibody. The best fit line is shown as a solid line and the 95% confidence bands of the best fit line are represented by the dotted lines.