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By H Nishiura

Abstract

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

Year: 2010
OAI identifier: oai:CiteSeerX.psu:10.1.1.170.1968
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