Conclusion Based on the criterion of MSE and the predicted vector infection rate, the method was proved feasible in determining pool size and number of pools.

结论依据感染率预估值确定混合样本大小与混合样本量的研究思路，具一定的可行性。

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Objective To construct the clone vector of S gene in occult hepatitis B virus infection. To analyse its mutations and to construct its prokaryotic expression vector.

目的构建克隆载体，分析隐匿性乙型肝炎病毒S基因的突变情况，构建其原核融合蛋白表达载体。

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