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特許 係属中 Human immunodeficiency virus infection / acquired immunodeficiency syndrome (HIV/AIDS) is a disease of the human immune system caused by infection with human immunodeficiency virus (HIV).[1] The term HIV/AIDS represents the entire range of disease caused by the HIV virus from early infection to late stage symptoms. During the initial infection, a person may experience a brief period of influenza-like illness. This is typically followed by a prolonged period without symptoms