[Epidemiological study of A (H1N1) pdm09 in Iki Island, Nagasaki].

An epidemic situation of pandemic (H1N1) 2009 was investigated from August 1 to March 31 in Iki City, an isolated island with a population of about 30,000. All members of the Iki Physicians' Association participated in the investigation. Daily reports of patients with influenza were made to the local health center.