Acellular vaccines v whole-cell vaccines for preventing whooping cough (follow-up range 1 d to 28 mo)*
| Weighted event rates | |||||
|---|---|---|---|---|---|
| Outcome | Number of studies | Acellular | Whole cell | RRR (95% CI) | NNT (CI) |
| *Abbreviations defined in glossary; RRR, NNT, and CI calculated from data in article. | |||||
| Non-completion of primary series | 14 | 0.37% | 1.17% | 72% (67 to 76) | 125 (111 to 143) |