https://blog.wongcw.com/2022/01/13/%e7%a0%94%e7%a9%b6%ef%bc%9a%e5%8f%a3%e7%bd%a9%e5%8f%af%e5%b0%87%e7%a9%ba%e6%b0%a3%e4%b8%ad%e7%9a%84%e7%97%85%e5%8e%9f%e9%ab%94%e5%82%b3%e6%92%ad%e8%b7%9d%e9%9b%a2%e6%b8%9b%e5%b0%91%e4%b8%80%e5%8d%8a/
研究:口罩可將空氣中的病原體傳播距離減少一半