AsC serves as the source of infection to make easily infected group new HBV infectors through mother-baby transmission, iatrogenic infection, blood and blood product pollution, child-to-child transmission and sexual transmission.

• AsC作为传染源通过母婴传播、医源性传播、血液及血制品污染、生活密切接触传播及性传播,使易感人群成为新的HBV感染(HBV infection,HBI)。