【单选题】【消耗次数：1】
新发传染病流行病学特点不包括
①
新发传染病的病原体种类多，以病毒性新发传染病所占比例最大
②
病原体的宿主种类多样，动物更多的成为新发传染病病原体的宿主或传染源
③
传播途径多样
④
人类普遍缺乏对新发传染病的免疫力
⑤
人畜共患性
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相关题目
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新发传染病流行病学特点
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