Occult hepatitis B virus infection: Bit player or role player?
隐匿的乙肝病毒感染：是少许参与者还是角色扮演者？
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。
They are those in which the virus persists in an occult, or cryptic, form most of the time.
潜伏感染是指病毒在大部分时间是隐伏的。
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