Clinical features of cases of influenza A (H1N1)v in Osaka prefecture, Japan, May 2009

N Komiya; Y Gu; H Kamiya; Y Yahata; T Matsui; Y Yasui; N Okabe

doi:10.2807/ese.14.29.19272-en

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Clinical features of cases of influenza A (H1N1)v in Osaka prefecture, Japan, May 2009
N Komiya¹ , Y Gu¹ , H Kamiya² , Y Yahata² , T Matsui² , Y Yasui² , N Okabe²
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Affiliations: ¹ Field Epidemiology Training program, National Institute of Infectious Diseases (NIID), Tokyo, Japan ² Infectious Disease Surveillance Center, National Institute of Infectious Diseases (NIID), Tokyo, Japan

Correspondence:
N Komiya
kominobu nih.go.jp
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Citation style for this article: Komiya N, Gu Y, Kamiya H, Yahata Y, Matsui T, Yasui Y, Okabe N. Clinical features of cases of influenza A (H1N1)v in Osaka prefecture, Japan, May 2009. Euro Surveill. 2009;14(29):pii=19272. https://doi.org/10.2807/ese.14.29.19272-en Received: 16 Jul 2009

Abstract

This report describes the clinical characteristics of influenza A(H1N1)v virus infection in Osaka. By the end of May, 171 cases had been reported in Osaka. Most patients were from one school. No patient had a serious underlying medical condition.Clinical symptoms were mild and resembled those of seasonal influenza. The sensitivity of the rapid antigen test was 77%. Antivirals were given to the majority of the cases. Early antiviral treatment may have shortened the duration of fever.