Ordinary protective face mask s are difficult to buy recently, so there are many more methods online, such as padding gauze in the mask to prevent new coronaviruses.
Recently, it is said that the gauze in the inner layer of the ordinary mask can more effectively prevent the spread of new pneumonia and play a better effect. So is this true?
Expert reply: fake! The effect will not be significantly improved, but will also increase the chance of infection.
The reason why the medical surgical mask can play a protective role is that the inside and outside of the mask have a specially treated surface layer and a filter layer. And ordinary masks don't. Even the cushion gauze does not have the same effect, and cannot intercept or absorb the fine particles in the air. So do n’t be silly to put gauze or tissues in the mask.
1. When going to the hospital.
2. When taking public transportation.
3. During the high flu incidence, you need to stay in a relatively closed or crowded space for a long time.
4. If there is a colleague or classmate who has a cold in an office or a school class.
5. When the patient comes into close contact with people.
At present, common masks on the market can be divided into three categories, medical surgical masks, medical protective masks (N95 masks), and ordinary cotton yarn masks. Medical surgical masks generally have three layers, from the outside to the inside are the waterproof layer, the filter layer, and the comfort layer. The comfort layer is a layer of gauze. The medical surgical mask can block 70% of pathogens.
Medical protective masks (N95 face masks) commonly used N95 masks are actually divided into two types, one is biological mask (blue-green), model 1860 or 9132; one is dust mask (white), model 8210. Citizens should choose bio-resistant medical protective masks when buying. N95 masks can block 95% of pathogenic bacteria.
The material of cotton yarn masks may be cotton, gauze, wool, canvas and velvet. Because the material itself is not dense enough to prevent infection, it can only block 36% of pathogens.
Experts said that citizens should choose the first two masks, for the purpose of self-protection and reducing the risk of respiratory tract infection, wearing the first two masks (that is, medical surgical masks and N95 masks).
If you are going to a general open-air public place and are not in close contact with patients with respiratory tracts, it is sufficient to wear a medical surgical mask, and there is no need to overprotect. However, if they will contact patients with suspected respiratory tract infections, they need to wear bio-protective N95 masks to provide effective protection.