Post-exposure zanamivir v placebo for prevention of influenza in household contacts of people with influenza-like illness‡
| Outcome at 28 days | Zanamivir | Placebo | RRR (95% CI) | NNT (CI) |
|---|---|---|---|---|
| ‡Abbreviations defined in glossary; RRR, NNT, and CI calculated from data in article. | ||||
| Families with laboratory confirmed influenza in ≥1 contact | 4% | 19% | 78% (53 to 90) | 7 (5 to 12) |