The flow diagram of infectious disease surveillance system in Japan.
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Footnote; This flow diagram cited was Reference 7.
Appendix: The formula for the point estimate and the 95% confidence intervals for the number of virological type-specific influenza-like illness cases.
i is an age category and j is a category of virological type of influence-like illness. A proportion of virological type j in an age-category i sample from the virological surveillance system is pij and its variance is v1ij. Estimated number of cases of influenza-like illness and its variance in the age category i is αi and v2i, which is derived from previous studies [8,9]. The estimated number of cases of influenza-like illness from virological type j in the age category i is αij = pijαi and its variance is expressed as [17]. Finally, the total estimated number of cases of virological type (j) -specific influenza-like illness and its variance was derived by α∙j = Σipijαi and v∙j = Σivij. The approximate 95% confidence interval for α∙∙ is given to be .
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创建时间：
2016-01-28
