在世界范围内,尽管提倡安全避孕和使用药物预防、职业预防和供血筛选标准,人免疫缺陷病毒(HIV)感染的人数估计已从1980年的10万增加到1997年的2800万。据估计2000年前全世界有3000～4000万人经注射途径感染。当发展中国家仍在继续发生众多的HIV感染病例时,发达国家的流行病学趋 Worldwide, despite the promotion of safe contraception and the use of drug prevention, occupational prevention and blood screening standards, the number of human immunodeficiency virus (HIV) infections is estimated to have increased from 100,000 in 1980 to 28 million in 1997. It is estimated that 30 to 40 million people worldwide are infected by the injection route by 2000. When developing countries continue to suffer from numerous cases of HIV infection, epidemiological trends in developed countries