| Blood Group | Asymptomatic | Mild | Moderate | Severe | Total |
| B+ | 25 | 77 | 85 | 136 | 323 |
| B− | 0 | 8 | 12 | 18 | 38 |
| O+ | 30 | 134 | 99 | 73 | 336 |
| O− | 4 | 6 | 9 | 7 | 26 |
| A+ | 22 | 32 | 57 | 78 | 189 |
| A− | 1 | 1 | 2 | 1 | 5 |
| AB+ | 20 | 18 | 27 | 39 | 104 |
| AB− | 4 | 6 | 11 | 8 | 29 |
| Total | 106 | 282 | 302 | 360 | 1050 |