But, it could not exert any effects on control of HBV intrauterine transmission (infection of fetus through placentae), even together with other approaches.

• HBV的宫内感染必须借助胎盘而形成,因此,既往有关HBV宫内传播机制的研究多以此为重点进行在体研究和流行病学描述性研究。