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Methods for estimating herd immunity effects
| Included herd immunity effects, n (%) | Reported ICER with and without herd immunity effects, n (%) | |
|---|---|---|
| Total number of studies | 44 (100) | 16 (100) |
| Dynamic transmission model | 11 (25) | 0 (0) |
| Static model | 33 (75) | 16 (100) |
| Decrease in incidence of the disease | 10 (30) | 4 (25) |
| Increased vaccine efficacy | 3 (9) | 3 (19) |
| Increase of direct vaccine impact on health outcome | 18 (54) | 9 (56) |
| Not stated | 2 (6) | 0 (0) |
