乙型肝炎是人类主要疾病之一。全球乙肝病毒血清学试验阳性者超过20亿人。此外,全球3.5亿慢性乙型肝炎病毒携带者处于肝硬化或肝癌的死亡阴影中。一年几乎有100万人死于肝硬化或肝癌。自1982年乙肝疫苗应用以来。乙肝疫苗预防慢性乙肝携带的有效率约95％。儿童接种已使肝癌的发生率明显下降。全球约100个国家响应WHO的号召,将 Hepatitis B is one of the major human diseases. The global hepatitis B serological test positive over more than 2 billion people. In addition, 350 million people with chronic hepatitis B virus worldwide are in the shadow of death from cirrhosis or liver cancer. Almost a million people die of cirrhosis or liver cancer a year. Since the 1982 hepatitis B vaccine application. Hepatitis B vaccine to prevent chronic hepatitis B carrying efficiency of about 95%. Child vaccination has markedly reduced the incidence of liver cancer. About 100 countries in the world respond to the WHO’s call