获得性免疫缺陷综合征或爱滋病(AIDS)是近几年来新发现的一种由病毒感染引起的严重免疫缺陷病。一、流行病学本病从80年代初期起才引起人们的注意。1981年6、7月间,有人报道美国的洛杉矶市有5名原来很健康的男性同性恋者发生了卡氏肺囊虫肺炎。纽约和洛杉矶市 Acquired immunodeficiency syndrome or AIDS (AIDS) is a newly discovered severe immunodeficiency disease caused by virus infection in recent years. First, the epidemiology of the disease from the early 1980s has aroused people’s attention. In June and July 1981, it was reported that five unidentified male homosexuals in Los Angeles City of the United States had Pneumocystis carinii pneumonia. New York and Los Angeles