The prevalence of pandemic (H1N1) 2009 in a suburb of Osaka city--based on reports on the temporary closing of classes.

Abstract

An outbreak of pandemic (H1N1) 2009 occurred in May 2009 in Osaka and Kobe, Japan. We studied the prevalence of this strain of influenza in Yao City. According to the study, the frequency of temporary class closure did not vary significantly among the first to sixth grades of elementary schools; however, there was a markedly lower frequency of temporary closures among junior high school third-year classes.