What kind of mask can be worn for prevention and control?

Recently, the Bureau of Disease Control and Prevention of the National Health Commission issued the "Guidelines for the Use of Pneumonia Masks for the Prevention of New Coronavirus Infection", which responded in detail to a series of issues that the public should pay attention to when wearing masks.

The "Guide" points out that masks are an important line of defense to prevent respiratory infectious diseases and can reduce the risk of new coronavirus infection. The mask can not only prevent the patient from spraying droplets, reduce the droplet volume and spray speed, but also block the virus-containing droplet nucleus and prevent the wearer from inhaling it.

Common masks mainly include ordinary masks (such as paper masks, activated carbon masks, cotton masks, sponge masks, gauze masks, etc.), disposable medical masks, medical surgical masks, medical protective masks, KN95/N95 and above particulate protective masks.