武漢肺炎：醫用口罩能防止病毒傳播嗎？
圖片版權 Getty Images Image caption 戴醫用口罩到底能起多大作用
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｜originally written by uienwt
有證據顯示，戴口罩有助於防止通過由手到口的傳染源。還是能降低由於咳嗽或是打噴嚏所產生的「飛沫」感染機會。
References
https://www.bbc.com/zhongwen/trad/science-51221775https://www.bbc.com/zhongwen/trad/science-51221775
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