49. 下列何項暴露為發展後天性免疫不足症候群(acquired immune deficiency syndrome, AIDS)的充分因子(sufficient cause)?
(A)與感染Human immunodeficiency virus (HIV)者有接觸
(B)經常參與高危險性性行為
(C)缺乏反轉錄脢抑制劑(antiretroviral drugs)的治療
(D)以上皆非

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統計: A(0), B(8), C(2), D(9), E(0) #2748294