При хора Tamiflu е сравняван с плацебо (сляпо лечение) в проучвания на лечението на грип (2413 възрастни и подрастващи, 741 пациенти в напреднала възраст и 1033 деца).
In the prevention of flu, Tamiflu was studied in patients who had been exposed to the disease when one of their family members contracted flu (962 cases) or during an epidemic (1,562 subjects aged between 16 and 65 years, and 548 elderly subjects in nursing homes).