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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 1.1 All serotypes | 1 | Odds Ratio (IV, Fixed, 95% CI) | Subtotals only | |
| 1.1.1 All serotypes | 1 | Odds Ratio (IV, Fixed, 95% CI) | 0.23 [0.15, 0.35] |
