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自从1981年6月对AIDS认识以来,后天获得免疫缺陷综合症(AIDS)引起了美国及国外人在广泛的点注及恐惧。现已清楚AIDS不仅在北美及海地流行,在西欧15个国家及中非洲亦有流行。接近60％的的病例是高加索人;15％是西班牙人,25％是黑人(包括海地人);很少是东方人。在美国大约70％AIDS患者是同性恋或者是两性者。报导有5岁以下儿童符合疾病控制中心CCDC有关AIDS的临床诊断标准。免疫学上AIDS的标志是T淋巴细胞的缺陷,最常见是T辅助细胞亚群的减少,体液免疫则相对保存。
Acquired immunodeficiency syndrome (AIDS) since its recognition of AIDS in June 1981 has caused widespread abuse and fear among Americans and foreigners. It is now clear that AIDS is endemic not only in North America and Haiti, but also in 15 countries in Western Europe and Central Africa. Nearly 60% of cases are Caucasians; 15% are Hispanics and 25% are Blacks (including Haitians); few are Asians. About 70% of AIDS patients in the United States are gay or bisexual. Children under 5 years of age were reported to meet CCDC clinical diagnostic criteria for AIDS in the Centers for Disease Control and Prevention. Immunologically, the hallmark of AIDS is a deficiency of T lymphocytes, the most common of which is a decrease in T helper cell subsets, while humoral immunity is relatively preserved.