Roche Laboratories information site.

September 27, 1999: Preliminary study results demonstrate the safety of Hoffmann-La Roche Inc.'s Tamiflu (oseltamivir phosphate) in elderly and high-risk patients, as well as data that shows the efficacy and safety benefit of Tamiflu in the long-term prevention of influenza in elderly patients. In addition, studies in the U.S., Europe, Canada and China show that Tamiflu consistently and significantly reduces the duration of flu.