| CD | Cluster of differentiation |
| COVID-19 | coronavirus disease 2019 |
| ELISA | Enzyme-linked immunosorbent assay |
| EMA | European Medicine’s Agency |
| FDA | American and Druga Administration |
| IFN-γ | Interferon-gamma |
| IL | Interleukin 2 |
| RBD | Receptor-binding domain |
| RBM | Receptor-binding motif |
| SARS | Severe Acute Respiratory Syndrome |
| TFH | T follicular helper cells |
| Th1 | T helper cell type 1 |
| Th2 | T helper cell type 1 |
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