Epidemic Preparedness Index score by k-means clusters
| EPI cluster | Mean Epidemic Preparedness Index score (SD) | Countries (n) |
| EPI cluster 1 (most prepared) | 88.9 (5.0) | 36 |
| EPI cluster 2 | 74.2 (3.1) | 40 |
| EPI cluster 3 | 62.9 (4.5) | 52 |
| EPI cluster 4 | 45.0 (4.5) | 42 |
| EPI cluster 5 (least prepared) | 25.1 (8.7) | 18 |
EPI, Epidemic Preparedness Index.