市面上的口罩基本分为三类: 民用口罩, 医用口罩和专业呼吸防护口罩. 民用口罩, 例如一次性护理口罩. 主要是指满足大多数人日常生活、工作需要的日常防护口罩. 医用口罩分为医用防护口罩 (N95口罩), 医用外科口罩和 …

Workers make medical protective masks at a factory in Nanchang, Jiangxi province. [Photo by Hu Guolin/For China Daily] A video, claiming the sterilization processes of masks leave carcinogens on the products, has raised concerns among the general public last week. 所以, what exactly does happen during mask production? Is it really a cause for concern? 1. What is used to …