Diagnostic Performance of Three ELISAs for Detection of Antibodies against SARS-CoV-2 in Human Samples

Figure 2

ELISA performed with different severe acute respiratory syndrome (SARS-CoV-2) proteins used as antigens. (a–c) IgG anti-SARS-CoV-2 detected by ELISA using N (a), S (b), and RBD (c) antigens. The cutoff was set as the mean plus two standard deviations of the healthy control samples. The correlations of the ELISA values between N and S (d), N and RBD (e), and S and RBD (f) antibody values. The Pearson correlation coefficient (r) was used to measure the strength of the correlation between the ELISA results performed with different antigens. The results are from one experiment of the three experiments performed.

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