In haze weather, masks have become standard for going out. China's first national standard for civil protective masks issued by the National Standardization

1. In order to avoid dry face, clean the face before wearing a mask, and use moisturizing and moisturizing products,

There are actually many types of masks. Different types of masks are classified according to different usages,

At the press conference on epidemic prevention and control in Shanghai on February 8, health and epidemic

1. Medical surgical masks are composed of three layers of different structures. The outer layer is blue,

1. Medical protective masks (N95)>Medical surgical masks>Disposable medical masks.

If the mask worn is a disposable ordinary mask, it is not effective in preventing the new coronavirus,

Two-layer masks are of poor quality. Medical masks must have three layers.

Wearing a mask may cause contact dermatitis of the skin,