Evolution of clinical inflammatory bowel disease (IBD) score 4 weeks after vaccination
| IBD clinical score activity | CD (N=390) | UC (N=158) | IC (N=6) |
| HBI at baseline, median (IQR) | 1 (0;3) | – | – |
| PMS at baseline, median (IQR) | – | 1 (0;2) | 1 (0;2) |
| Absence of flare, n (%) | 377 (96.7) | 151 (95.6) | 5 (83.3) |
| Rise of 3 points, n (%) | 1 (0.2) | 4 (2.5) | 0 (0) |
| Rise of 4 points, n (%) | 3 (0.8) | 1 (0.6) | 1 (16.7) |
| Rise of ≥ 4 points, n (%) | 9 (2.3) | 2 (1.3) | 0 (0) |
CD, Crohn's disease; HBI, Harvey–Bradshaw Index; IC, indeterminate colitis; PMS, Partial Mayo Score; UC, ulcerative colitis.