Table 4.
Analysis on the durability of protection against Omicron reinfection with hybrid immunity (booster vaccination) (days).a
| Time from booster vaccination to reinfection | Number of articles | Number of studies | Pooled PE Estimate and 95% CI | p | I2 (%) | p | Effect model | p for Egger’s test |
|---|---|---|---|---|---|---|---|---|
| 30 ~ 59 | 5 | 8 | 78.26% (74.87–81.65%) | <0.001 | 97.7 | <0.001 | Random | |
| 60 ~ 89 | 5 | 11 | 78.14% (70.91–85.37%) | <0.001 | 99.5 | <0.001 | Random | 0.079 |
| 90 ~ 119 | 1 | 4 | 73.49% (68.95–78.04%) | <0.001 | 0.00 | 0.759 | Fixed |
a
The exposed group was hybrid immunity (booster vaccination); the control group was never infected and unvaccinated.