他介绍说，艾滋病是由人类免疫缺陷病毒感染引起的。
He said that AIDS is from human immunodeficiency virus infection.
艾滋病是由人类免疫缺陷病毒，也就是艾滋病病毒引起的传染病。
AIDS is by the human immunodeficiency virus, HIV is caused by infectious diseases.
艾滋病是由人类免疫缺陷病毒(HIV)感染引起的一种严重威胁人类身体健康的疾病。
AIDS is a severe disease threatening the human health and caused by HIV the ealy diagnosis plays the important role for prevent the AIDS spread besides the effective vaccine and the drug.
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