To compare the persistence, susceptibility and resistance of influenza A and influenza B viruses in oseltamivir therapy in outpatients of various ages.
Japan Physicians Association, Tokyo Medical Association Building 3F, Kanda-Surugadai, Chiyoda-ku, Tokyo, Japan. nkawai@city.gifu.med.or.jp <nkawai@city.gifu.med.or.jp>