新冠肺炎疫情全球蔓延,不少公卫专家都呼吁民众配戴口罩预防传染,但市面上口罩款式多,究竟哪种才是最有效的?
对此,美国杜克大学(Duke University)实测14种生活中最常见的口罩,结果显示医护人员常戴的N95口罩最能阻挡飞沫传播,至于常被摩托骑士拿来遮住口鼻的蒙面颈巾则是最差的!
根据美国有线电视新闻网(CNN)报道,仅管口罩是帮助对抗疫情最有效的工具之一,但并不是每种款式都有用处。杜克大学物理系本月7日发表研究报告,研究人员实测14种在日常生活中常见的口罩,利用雷射光束和手机去观察当人在说话时所传播之飞沫,评估这些口罩阻挡飞沫的效能。
研究者之一的马丁(Martin Fischer)表示,每个口罩都有经过至少10次的试验,结果显示,最具防护能力的是医护人员常戴的N95口罩,其次是在家也能制作的3层手术用口罩及棉布口罩。
至于表现最差的是蒙面颈巾,研究指出这种颈巾材质会将水滴分解成较小的颗粒,变得更容易被空气带走。此外,一般民众常戴的针织口罩对于预防飞沫传染也没有多大帮助。
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