(A) Antibody values of five commercially available immunoassays targeting the S (spike) (blue) or the NC (nucleocapsid) protein (yellow) and virus neutralizing assays (grey) displayed against the weeks after infection for each individual from group A. Dashed horizontal lines display cutoff values of individual serological assays. Results of the virus neutralizing immunoassay are categorized into <1:10, 1:10, and ≥1:50. (B) The sensitivity in % achieved by assays against the S-protein (blue), the NC antigen (yellow), the combination of assays targeting the different proteins (red), and the virus neutralizing (VN) test (grey) for group A. LVN, live virus neutralization assay; PVN, pseudovirus neutralization assay; ID100, 100% inhibitory dilution; ID50, 50% inhibitory dose.