假口罩沒有熔噴層,就真的一點不能防病毒,所以必須討論真假
回答: 普通醫用口罩的熔噴層還是能防一些病毒的,但是有限,20-30%的樣子,遠不如KN95和N95,但普通人在日常生活中戴還是可以的,
由 stopthinking
於 2021-02-15 19:38:16
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