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