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. 2021 Apr 20;4:486. doi: 10.1038/s42003-021-02011-6

Fig. 3. Identification of SARS-CoV-2 IgG and IgM seroconversion by C19BA.

Fig. 3

a Titration curves of the reactivity of individual serum samples against RBD, S1, and N proteins measured by flow cytometry against IgG by C19BA (top) and ELISA (bottom) for each cohort: preCOVID (red, n = 10) and COVID (black, n = 10). COVID serum samples were obtained at time of hospital admission (PCR+). b AUC values for the experiment shown in a. c Titration curves of the reactivity of individual serum samples against RBD, S1, and N proteins against IgM by C19BA (top) and ELISA (bottom). d AUC values for the experiment shown in c. Statistical analyses were performed using an unpaired two-tailed Student’s t-test. Asterisks represent p values (***p < 0.001, *p < 0.05, ns not significant). Horizontal lines represent median values.