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. 2021 Jan 4;12:113. doi: 10.1038/s41467-020-20383-x

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© This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2021

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Fig. 1 — Utilizing both venipuncture-derived fresh blood and dried blood spots, we have standardized a dual-antigen ELISA platform for highly specific (IgG = 100%, 95% confidence interval = 98.5–100) detection of SARS-CoV-2 antibodies for application in precise, large-scale serosurvey efforts.