Epidemiology of influenza A(H1N1)v virus infection in Japan, May - June 2009

T Shimada; Y Gu; H Kamiya; N Komiya; F Odaira; T Sunagawa; H Takahashi; T Toyokawa; Y Tsuchihashi; Y Yasui; Y Tada; N Okabe

doi:10.2807/ese.14.24.19244-en

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Epidemiology of influenza A(H1N1)v virus infection in Japan, May - June 2009
T Shimada¹ , Y Gu¹ , H Kamiya¹ , N Komiya¹ , F Odaira¹ , T Sunagawa¹ , H Takahashi¹ , T Toyokawa¹ , Y Tsuchihashi¹ , Y Yasui¹ , Y Tada¹ , N Okabe¹
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Affiliations: ¹ Infectious Diseases Surveillance Center, National Institute of Infectious Diseases, Tokyo, Japan

Correspondence:
T Shimada
tomoes nih.go.jp
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Citation style for this article: Shimada T, Gu Y, Kamiya H, Komiya N, Odaira F, Sunagawa T, Takahashi H, Toyokawa T, Tsuchihashi Y, Yasui Y, Tada Y, Okabe N. Epidemiology of influenza A(H1N1)v virus infection in Japan, May - June 2009. Euro Surveill. 2009;14(24):pii=19244. https://doi.org/10.2807/ese.14.24.19244-en Received: 10 Jun 2009

Abstract

Between 9 May and 4 June 2009, a total of 401 laboratory-confirmed cases of influenza A(H1N1)v virus were reported in Japan, from 16 of the 47 Japanese prefectures. The two areas most affected were Osaka prefecture and Kobe city where outbreaks in high schools occurred leading to school closures. To date all cases have had symptoms consistent with seasonal influenza and no severe or fatal cases have been reported.