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乙型肝炎是严重威胁人类健康的多发病之一。据估算,全球大约有20亿人已经感染过这种病毒。在这些被感染者中,约有3.5亿人转入慢性感染阶段,随病情发展,极易患肝硬化或原发性肝癌。目前,原发性肝癌已成为非洲、亚洲以及太平洋流域各国,男性癌性死亡中最常见的一种。每年全世界大约有100～200万人死于乙型肝炎所致的肝硬化和原发性肝癌。在发展中国家,乙型肝炎传播的主要方式是儿童与儿童之间的传播,或者是
Hepatitis B is one of the most frequently-occurring diseases that threaten human health. It is estimated that about 2 billion people around the world have been infected with the virus. In these infected people, about 350 million people into the stage of chronic infection, with the progression of the disease, highly susceptible to cirrhosis of the liver or primary liver cancer. Currently, primary liver cancer has become the most common type of cancer among men in Africa, Asia and the Pacific Basin. About 1 to 2 million people die from cirrhosis and primary liver cancer caused by hepatitis B each year. In developing countries, the primary mode of transmission of hepatitis B is child-to-child transmission or