AIDS
即acquired immunodeficiency syndrome,艾滋病或获得性免疫缺乏综合征,是由人类免疫缺陷病毒(HIV)感染引起的机体免疫功能损害,继发恶性肿瘤及机会性感染,主要通过性传播。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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