2009年6月
TRANSMISSION POTENTIAL OF THE NEW INFLUENZA A(H1N1) VIRUS AND ITS AGE-SPECIFICITY IN JAPAN
EUROSURVEILLANCE
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- 巻
- 14
- 号
- 22
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- 出版者・発行元
- EUR CENTRE DIS PREVENTION & CONTROL
On 16 May 2009, Japan confirmed its first three cases of new influenza A(H1N1) virus infection without a history of overseas travel, and by 1 June, 361 cases, owing to indigenous secondary transmission, have been confirmed. Of these, 287 cases (79.5%) were teenagers (i.e. between 10 and 19 years of age). The reproduction number is estimated at 2.3 (95% confidence interval: 2.0, 2.6). The average number of secondary transmissions involving minors (those under 20 years of age) traced back to infected minors is estimated at 2.8. That is, minors can sustain transmission even in the absence of adults. Estimates of the effective reproduction number R(t) moved below 1 by 17 May. Active surveillance and public health interventions, including school closures most likely have contributed to keeping R(t) below one.
- リンク情報
- ID情報
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- ISSN : 1560-7917
- Web of Science ID : WOS:000268018100001