In a pooled analysis of two other studies conducted in unvaccinated otherwise healthy adults, oseltamivir 75 mg once daily given for 6 weeks significantly reduced the incidence of clinical influenza illness from 25/ 519 (4.8%) in the placebo group to 6/ 520 (1.2%) in the oseltamivir group (76% reduction [95% CI 1.6 – 5.7; p = 0.0006]) during a community outbreak of influenza.