Pandemic Influenza Virus Surveillance, Izu-Oshima Island, Japan - - Emerging Infectious Disease journal - CDC
Table of Contents
Volume 18, Number 11–November 2012
Pandemic Influenza Virus Surveillance, Izu-Oshima Island, Japan
The dynamics of an influenza epidemic are difficult to determine because they vary for each circulating influenza subtype. We evaluated the epidemiology of influenza A subtypes at Oshima Medical Center and Maeda Internal Medicine Clinic on Izu-Oshima Island, Japan. The island is a semiclosed community, which facilitates population-based surveillance. Access to the island is limited; ≈18,000 persons travel to and from the island each month, primarily to and from Tokyo (1). Izu-Oshima Island is 120 km southwest of Tokyo; population was 8,856 in January 2009.