Oseltamivir reduced the time to alleviation of all symptoms by 0.7 days (95% CI 0.1 – 1.6 days; p = 0.022) and the duration of fever (≥ 37.8 °C), cough and coryza by one day (95% CI 0.4 – 1.7 days; p < 0.001) compared to placebo.