Pandemic (H1N1) 2009 transmission during presymptomatic phase, Japan

Yoshiaki Gu, Nobuhiro Komiya, Hajime Kamiya, Yoshinori Yasui, Kiyosu Taniguchi, Nobuhiko Okabe

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


During an epidemiologic investigation of pandemic infl uenza (H1N1) 2009 virus infection in May 2009 in Osaka, Japan, we found 3 clusters in which virus transmission occurred during the presymptomatic phase. This fi nding has public health implications because it indicates that viral transmission in communities cannot be prevented solely by isolating symptomatic case-patients.

Original languageEnglish
Pages (from-to)1737-1739
Number of pages3
JournalEmerging Infectious Diseases
Issue number9
Publication statusPublished - 2011 Sep

ASJC Scopus subject areas

  • Epidemiology
  • Microbiology (medical)
  • Infectious Diseases


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