A subset of complex patients was selected for analysis using the live
SARS-CoV-2 neutralization assay because of limited resources (n=201).
Abbreviations: ELISA, enzyme-linked immunosorbent assay; ECLIA,
electrochemiluminescence immunoassay; CLIA, chemiluminescence
immunoassay; LFI, lateral flow immunoassay; N, nucleoprotein; RBD,
receptor binding domain of the SARS-CoV-2 spike glycoprotein; S1/2,
domain 1 or 2 of the SARS-CoV-2 spike glycoprotein; RBD+, extended
receptor binding domain of the SARS-CoV-2 spike glycoprotein
Table 4: Diagnostic accuracy of an anti-S1 ELISA (IgG) for the presence
of previous COVID-19 in various subgroups. Results of a diagnostic
accuracy study are given (n=3’637).