The effect of screening on mortality has not been determined.

筛查对死亡率的影响尚未确定。

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To determine key variables on the control of SARS epidemic through computer simulation methodology, especially to analyze the effect of "screening for fever" practice during the epidemics.

通过计算机对该模型的仿真模拟，分析在突发SARS疫情的情况下，代表主要防控措施的变量对疫情曲线的影响模式和相对强度。

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But even exit screening, he says, is unlikely to have much effect because of the virus' long incubation period.

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