乙型肝炎遍及世界各地,对肝脏损害大,与门脉性肝硬变关系密切,是世界上亟待解决的重要问题。(一)一般情况世界各地人群中HBsAg阳性的发现率差别很大,某些职业人群比较高,如护士、医生占10%,外科医生占20%,同性恋者高达50%。 Hepatitis B spreads all over the world, has great damage to the liver and is closely related to portal cirrhosis. It is an important issue to be solved urgently in the world. (1) General Situation The prevalence of HBsAg positive people in the world varies widely. Some occupational groups are quite high. For example, nurses and doctors account for 10%, surgeons account for 20% and homosexuals up to 50%.