What kind of mask should I choose to prevent the infection of novel coronavirus infection?

Recently, the novel coronavirus has received extensive attention due to its increasing number of infections. How to prevent it? Wearing a mask is a simple and public way. So which masks would better prevent new coronavirus? As follows:

1.Ordinary cotton mask: it is made of cotton, gauze, canvas and Other fabrics. For the material itself is not delicate enough to prevent infection, "it is not recommended to wear it".

2.General Medical Mask: this level of mask is not required to have a barrier effect on blood, and there is no requirement for tightness. Therefore, it is only used in the general environment, "cannot be better prevented".

3.Medical Surgical Mask

it can prevent respiratory tract infection to a certain extent. It can block the pollutants such as droplets, blood, body fluids, secretions, etc. "it has a certain role in prevention".

4.Medical protective mask: compared with "medical surgical mask", it has a higher level and a tighter facial fit. However, due to the high level and good fit of the filter material, it has a higher respiratory resistance. Wearing it for a long time will increase the sense of dyspnea and discomfort. The elderly, children and pregnant women should pay attention to it.

5.N95/Kn95 Face Mask

Compared with other respirators, the effect is better. The effect of filtering non oil particles is 95%

Attention:
When purchasing masks, try to buy them in pharmacies, shopping malls or other places with relevant certification. For online shopping, pay attention to the following matters: ex factory area, instructions, notes, and carefully select "imported products" without identification.