Detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) immunoglobulin G (IgG)/total antibodies in PCR-confirmed cases. Serum samples (N = 37) obtained from 26 SARS-CoV-2-infected patients (Pat.) were tested. A signal (S)/cut-off (CO) value ≥1 is considered as positive for SARS-CoV-2 IgG/total antibodies. The time in days after PCR (d.a.P.) and sample submission, as well as results of the ViraChip® IgG test (Viramed, VM), of the plaque reduction neutralization assay (PRNT, Figure S1), and of both recomLine assays (blot v1 and v2) are listed in the table. p, positive; n, negative; and nd, not determined. For better clarity, positive test results are printed in red in the table.