| aa | Amino acid |
| ACE2 | Angiotensin-converting enzyme 2 |
| CI | Confidence interval |
| CXCL-10 | C-X-C motif chemokine ligand 10 |
| ECLIA | Electrochemiluminescence immunoassay |
| IFN | Interferon |
| NAbs | Neutralizing antibodies |
| N-antibody | Nucleocapsid-antibody |
| N-sero-negative | Nucleocapsid-seronegative |
| NTD | N-terminal domain |
| RBD | Receptor-binding domain |
| RT-qPCR | Quantitative reverse transcription PCR |
| S- | Spike- |
| TP | Timepoint |
| VOC | Variant of concern |
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