| ACE2 | Angiotensin-converting enzyme 2 |
| ARDS | Acute respiratory distress syndrome |
| COVID-19 | Coronavirus disease 2019 |
| FUT1 (H gene) | Fucosyltransferase 1 |
| FUT2 (Secretor gene, Se) | Fucosyltransferase 2 |
| FUT3 (Lewis gene, Le) | Fucosyltransferase 3 |
| HBGAs | Histo-blood group antigens |
| Lea | Lewis antigen A |
| Leb | Lewis antigen B |
| RBCs | Red blood cells |
| SARS-CoV-2 | Severe acute respiratory syndrome coronavirus 2 |
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