Q: How to wear a mask?1. Before wearing a mask, you should wash your hands and choose a suitable size mask (children can choose a child size).2. Determine the inner and outer layers of the mask:Most m...
Whether it is for the new crown epidemic, prevention of influenza in autumn and winter, and prevention of pollen allergy in spring and summer, masks are important protective equipment that we cannot l...
At present, China's medical masks are mainly divided into three types: "medical protective masks" with the highest level of protection, "medical surgical masks" commonly used i...
