The objective is to study the relationship between fetomaternal cellular traffic and hepatitis B virus (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。

youdao

The hepatitis B virus 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。

youdao

Then we did much the same thing with a cancer caused by a virus, the hepatitis B virus.

接着，我们对病毒(乙肝病毒)引起的癌症做了类似的研究。

youdao

"Three hundred and fifty million human beings in the world are infected with Hepatitis-B virus.

VOA: standard.2010.02.16

So, either stimulates the production of-- and differentiation of B-cells, to produce a specific antibody that can neutralize the virus, or stimulates the production of cytotoxic T-cells that can kill infected cells within your body.

所以,疫苗的刺激要么能够,促进B淋巴细胞产生和分化,以生成特定的抗体来杀灭病毒,要么刺激T细胞释放细胞毒素,杀死身体里被感染的细胞

耶鲁公开课 - 生物医学工程探索课程节选

The hepatitis B virus is found in blood and bodily fluids.

VOA: standard.2010.07.26

By last week, 26 children under the age of five had died due to complications from Coxsackie B virus infections.

CNN: Why Are the Infants Dying?

This year's North American vaccine is made from three viruses: two types of influenza A virus (H3N2 and H1N1) and an influenza B virus.

CNN: Had a flu shot? You'll be OK -- maybe

It is not known if the Coxsackie B virus grows in the respiratory tract or in the gut -- so no one is sure if it is passed through mucus or feces.

CNN: Why Are the Infants Dying?