TABLE 1.

Sensitivity, specificity, and the lowest detection limit for the used laboratory assays.

Assay type	Sensitivity	Specificity	Lowest detection limit
LIAISON® SARS-CoV-2 TrimericS IgG	Days post-positive PCR ≥15 (94.5–99.6%)	99.7%	4.81 BAU/ml
Elecsys® Anti-SARS-CoV-2	Days post-positive PCR ≥14 days (97.0–100%)	99.80%	Qualitative test COI < 1.0–non-reactive COI ≥ 1.0 Reactive
iFlash-2019-nCoV Neutralization Antibody Test	95.4%–post-vaccination 90%–post-infection	98.0%	4 AU/ml
QuantiFERON SARS-CoV-2 (The QFN SARS-CoV-2 BCTs are for Research Use Only)	80.12%	92.99%	Qualitative test