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@cofacts
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First reported 1,641 days ago
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为什么外面没有人也要你戴口罩
科普:
喷嚏液体速度是35m/s,随距离衰
竭,2米后基本没有速度,空气中扩散
8米左右; 并且病毒可悬浮24小时!
意思就是:你出去就要戴口罩!别以
为外面没人就可以偷懒,谁也不知道
24小时内有多少人经过!
EBOLA
3 feet
6 feet
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