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4000 mark this message contains personal perspective
originally written by 4000
三層是指醫療口罩,從外而內有防潑濺、過濾及吸收濕氣的功能,對於6μm左右的微粒有90%以上的阻隔效果,醫護人員照護一般病人時,以佩戴外科口罩為原則;民眾當有咳嗽等感冒症狀時,以佩戴此種口罩就醫為宜,依設計可分為綁帶式、一體成形及耳掛式三類。

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https://www.cdc.gov.tw/Category/ListContent/ALlLL-8D7jvw4-ItzzgbmA?uaid=L3X5wVQhPaaLA-1AM1B6Xg
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