title: Epidemiology of influenza A(H1N1)v virus infection in Japan, May-June 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.
authors: Infectious Diseases Surveillance Center, National Institute of Infectious Diseases, Tokyo, Japan. tomoes@nih.go.jp
authors: T
authors: T
authors: Shimada
authors: Y
authors: Y
authors: Gu
authors: H
authors: H
authors: Kamiya
authors: N
authors: N
authors: Komiya
authors: F
authors: F
authors: Odaira
authors: T
authors: T
authors: Sunagawa
authors: H
authors: H
authors: Takahashi
authors: T
authors: T
authors: Toyokawa
authors: Y
authors: Y
authors: Tsuchihashi
authors: Y
authors: Y
authors: Yasui
authors: Y
authors: Y
authors: Tada
authors: N
authors: N
authors: Okabe
mesh_terms: D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D006801:Humans; D015994:Incidence; D053118:Influenza A Virus, H1N1 Subtype / Q000302:isolation & purification*; D007251:Influenza, Human / Q000453:epidemiology*; D011159:Population Surveillance; D011174:Portugal / Q000453:epidemiology; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors