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Continue to Chat疾控專家:口罩拉到下巴處會增加傳染風險此類口罩無防護作用 https://blog.wongcw.com/2021/01/14/%e7%96%be%e6%8e%a7%e5%b0%88%e5%ae%b6%ef%bc%9a%e5%8f%a3%e7%bd%a9%e6%8b%89%e5%88%b0%e4%b8%8b%e5%b7%b4%e8%99%95%e6%9c%83%e5%a2%9e%e5%8a%a0%e5%82%b3%e6%9f%93%e9%a2%a8%e9%9a%aa%e6%ad%a4%e9%a1%9e%e5%8f%a3/