Table 3.
Parameters for the individual effectiveness of vaccination (IEV) used in Equation (1) for delta and omicron variants.
| Delta | Omicron | |||
|---|---|---|---|---|
| Mean | 95% CI | Mean | 95% CI | |
| All-age category | ||||
| a 1 | 74.9 | (70.8–78.9) | 48.3 | (35.6–53.7) |
| a 2 | 96.2 | (95.6–96.9) | 62.1 | (48.0–66.0) |
| s | 0.149 | (0.132–0.165) | 0.149 | (0.132–0.165) |
| Under 65 years of age | ||||
| a 1 | 76.3 | (73.9–78.7) | 49.2 | (37.1–53.6) |
| a 2 | 93.8 | (93.1–94.6) | 60.5 | (46.7–64.4) |
| s | 0.164 | (0.152–0.177) | 0.164 | (0.152–0.177) |
| Over 65 years of age | ||||
| a 1 | 65.0 | (70.8–78.9) | 41.9 | (22.9–57.5) |
| a 2 | 95.0 | (95.6–96.9) | 61.3 | (46.5–66.3) |
| s | 0.150 | (0.111–0.189) | 0.150 | (0.111–0.189) |