| SARS-CoV-2 | Severe acute respiratory syndrome coronavirus type 2 |
| COVID-19 | Coronavirus disease 2019 |
| Nuc-Ab | Nucleocapsid antibody |
| S-Ab | Spike antibody |
| N-Ab | Neutralizing antibody |
| ELISA | Enzyme-linked immunoassay |
| CLIA | Chemiluminescent immunoassay |
| HCWs | Healthcare workers |
| T-Ab | Total spike antibody |
| ECLIA | Electro-chemiluminescent immunoassay |
| COI | Cut-off index |
| CI | Confidence interval |
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