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. 2021 Nov 24;102(11):001692. doi: 10.1099/jgv.0.001692

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© 2021 The Authors

This is an open-access article distributed under the terms of the Creative Commons Attribution License. The Microbiology Society waived the open access fees for this article.

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Fig. 3. — Correlations between serum levels of specific antibodies targeting SARS-CoV-2 structural proteins N, S1 and E in (a) SARS-CoV-2- patients with confirmed SARS-CoV-2 infection; (b) Healthy, blood donors without confirmed SARS-CoV-2 infection, blood collected between March and June 2020; (c) Historical, serum samples collected from healthy volunteers in the years 2010–2017. Normalized ELISA units are compared, P-values calculated by Pearson correlation are presented. Red, strong correlation; blue, weak correlation. Linear regression was used.