The objective is to study the relationship between fetomaternal cellular traffic and hepatitis Bvirus (HBV) intrauterine infection.
目的是探讨母胎细胞转运与乙型肝炎病毒（HBV）宫内感染的关系。
2
The hepatitis Bvirus is 50 to 100 times more infectious than HIV.
乙型肝炎病毒的传染性比艾滋病毒强50至100倍。
3
This year’s seasonal vaccine contains three influenza viruses — one A (H3N2) virus, one regular seasonal A (H1N1) virus unrelated to the swine flu strain and one Bvirus.