众多的HBsAg携带者已成为世界性的社会卫生问题。确实有效的HBsAg阴转措施国内外均未找到。从研究影响HBsAg携带者阴转因素着手,避免有害因素,利用有利因素,以促进阴转是很有必要的。一九八四年,我们应用病例-对照研究方法(Case-Control study),对影响HBsAg携带者阴转的一些因素进行了流行病学研究。 Numerous HBsAg carriers have become a worldwide social health problem. Indeed, no effective measures of HBsAg were found at home and abroad. From the study of negative factors affecting HBsAg carriers, to avoid harmful factors, the use of favorable factors to promote negative conversion is necessary. In 1984, we used a case-control study to conduct epidemiological studies of some of the factors that affect the negative conversion of HBsAg carriers.