Objective To evaluate the efficacy and safety of lamivudine treatment and active-passive immunization during the last trimester of pregnancy in preventing intrauterine HBV infection.
目的评估妊娠晚期应用拉米夫定联合主被动免疫对于阻断HBV母婴传播的疗效及安全性。
Objective To study the efficacy and possible mechanism of active and passive immunization during pregnancy in preventing intrauterine HBV infection.
目的探讨孕妇主动与被动联合免疫预防乙型肝炎病毒（H BV）宫内感染的作用和机理。
This may be achieved by active or passive immunization.
主动和被动免疫可以达到保护易感者的目的。
This may be achieved by active or passive immunization.
主动和被动免疫可以达到保护易感者的目的。
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