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. 2021 Feb 23;13(2):347. doi: 10.3390/v13020347

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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 (http://creativecommons.org/licenses/by/4.0/).

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Correlation of the results obtained using RLA with those obtained using ELISA and neutralization titers. The 21 selected samples consisted of nine samples from patients with COVID-19 and four apparently positive, six slightly high, and two negative samples from hospital staff. Correlation of the results obtained using RLA with anti-SARS-CoV-2 N determined using ELISA (A), anti-SARS-CoV-2 S determined using ELISA (B), and neutralization antibody titers (C). The correlation coefficients were 0.92, 0.87, 0.93 (Spearman’s rank correlation coefficient), respectively.