There's no known cure for hepatitis B, although the virus can be kept in check with anti-viral medicines.

VOA: standard.2010.07.26

Hepatitis is a virus that specifically affects the liver, so viruses are often specific to certain kinds of cells.

肝炎病毒就可以特异性的感染肝细胞,因病毒通常都有细胞特异性

耶鲁公开课 - 生物医学工程探索课程节选

So, Hepatitis is already infecting cells of their liver, their liver is actively making new virus.

乙肝病毒已经感染了他们的肝细胞,他们的肝脏正在迅速地产生新的病毒

耶鲁公开课 - 生物医学工程探索课程节选

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

VOA: standard.2010.02.16

Three hundred million people in the world are infected with Hepatitis-C virus.

VOA: standard.2010.02.16

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

VOA: standard.2010.07.26