获得性免疫缺陷综合症(简称AIDS),表现为某些条件下的感染(O.I.)和/或恶性肿瘤,其死亡率很高。虽然目前尚无有效治疗方法,但有人提出了一些降低该综合症发病率的办法。最近,在法国、美国已有证据表明该病的致病因子是一种反转录病毒。一九八一年美国首次报道了AIDS病例,它在临床上可与其他疾病区别,表现为致死性的O.I.和恶性肿瘤。不久,世界其 Acquired immunodeficiency syndrome (AIDS), manifested as infection under certain conditions (O.I.) and / or malignant tumors, the mortality rate is high. Although no effective treatment is available, some proposals have been made to reduce the incidence of the syndrome. Recently, in France, there is evidence in the United States that the causative agent of the disease is a retrovirus. In 1981, for the first time in the United States, AIDS cases were reported. It was clinically distinguishable from other diseases, showing lethal O.I. and malignant tumors. Soon, the world