调查一次腹泻暴发,在甲、乙、丙餐馆用餐者分别有85%、15%和55%发病,饮用公用水者95%发病。据此判断以下何者可靠(  )A.传染来自甲餐馆,因其...

作者: rantiku 人气: - 评论: 0
问题 调查一次腹泻暴发,在甲、乙、丙餐馆用餐者分别有85%、15%和55%发病,饮用公用水者95%发病。据此判断以下何者可靠(  ) A.传染来自甲餐馆,因其顾客发病率最高 B.乙餐馆不是传染来源,因其顾客发病率最低 C.传染来自供水源,因其发病比例最高 D.传染来自甲或乙餐馆,或水源 E.尚不能得出确定性结论,因未做暴露者与非暴露者间的比较
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答案 E
解析

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