Is it necessary to wear a mask in foggy weather?

The production standard of medical protective mask (KN95/N95) is GB 19083-20 10, the standard number of medical surgical mask is YY 0469-201,and other smog prevention standards are GB2626-2006. Industrial protective masks are generally used to prevent droplets.

Medical surgical masks, the sealing performance is not as good as medical protective masks and KN masks, the particle filtration efficiency is less than 95%, but the bacterial filtration efficiency can reach more than 95% (the next article will explain in detail), the ventilation resistance is low, the wearing comfort is better, and it can meet the operation of common risks; Compared with KN mask, it has the function of liquid impermeability.

Precautions for using masks

You don't have to wear a mask everywhere. For healthy adults, a person can walk in an open place without wearing a mask, such as driving by himself. Wear a mask when entering crowded or closed places.

Patients with heart and lung diseases need to choose suitable masks under the guidance of professional doctors. Very young infants can't wear masks, which is easy to cause suffocation.