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Distribution of ABO blood groups and secretor status in hospitalized patients with COVID‐19, stratified by mild/moderate and severe/critical disease.
| Total number | Mild/moderate | Severe/critical | |
|---|---|---|---|
| n (%) | n (%) | ||
| ABO blood group | |||
| A | 29 | 14 (48) | 15 (52) |
| 0 | 23 | 11 (48) | 12 (52) |
| B | 6 | 4 (67) | 2 (33) |
| AB | 4 | 2 (50) | 2 (50) |
| Secretor status | |||
| Positive | 48 | 23 (48) | 25 (52) |
| Negative | 14 | 8 (57) | 6 (43) |
