Objective To study the efficacy and possible mechanism of active and passiveimmunization 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。
2
This may be achieved by active or passiveimmunization.
主动和被动免疫可以达到保护易感者的目的。
3
Objective To evaluate the efficacy and safety of lamivudine treatment and active-passiveimmunization during the last trimester of pregnancy in preventing intrauterine HBV infection.