title: Pandemic (H1N1) 2009 transmission during presymptomatic phase, Japan.
abstract: During an epidemiologic investigation of pandemic influenza (H1N1) 2009 virus infection in May 2009 in Osaka, Japan, we found 3 clusters in which virus transmission occurred during the presymptomatic phase. This finding has public health implications because it indicates that viral transmission in communities cannot be prevented solely by isolating symptomatic case-patients.
authors: National Institute of Infectious Diseases, Tokyo, Japan. ygu@nih.go.jp
authors: Yoshiaki
authors: Y
authors: Gu
authors: Nobuhiro
authors: N
authors: Komiya
authors: Hajime
authors: H
authors: Kamiya
authors: Yoshinori
authors: Y
authors: Yasui
authors: Kiyosu
authors: K
authors: Taniguchi
authors: Nobuhiko
authors: N
authors: Okabe
mesh_terms: D058345:Asymptomatic Infections / Q000453:epidemiology*; D016000:Cluster Analysis; D003140:Communicable Disease Control; D016358:Contact Tracing; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000453:epidemiology / Q000635:transmission* / Q000821:virology; D007564:Japan / Q000453:epidemiology; D058873:Pandemics; D012574:Schools; D013334:Students