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已知艾滋病是人类免疫缺陷病毒(HIV)感染最严重的结局。多数病人于诊断后2年内死亡,有些人则可长期保持健康,也有些可发生不大严重的疾病,如持续全身性淋巴结病,当这些人出现全身症状时,常预示艾滋病本身的表现。自1979年以来,美国已发现艾滋病24 000例,估计已有150万人受 HIV 感染,其中15％病人在感染后8年内发生艾滋病,在非洲也有难以对付的疫情。
AIDS is known to be the most serious outcome of human immunodeficiency virus (HIV) infection. Most patients die within 2 years after diagnosis, while others are able to maintain long-term health while others may experience less serious diseases such as persistent generalized lymphadenopathy. When these people have generalized symptoms, they often indicate the performance of AIDS itself. Since 1979, the United States has found 24,000 AIDS cases, and an estimated 1.5 million people are infected with HIV. Fifteen percent of them have AIDS within eight years of infection and an unmanageable epidemic in Africa.