All this time,

The covid-19 epidemic touches our hearts.

We at the center of the vortex,

As the number of confirmed cases climbed,

Everyone is concerned about:

How can I protect myself?

In terms of what you're most concerned about,

I would like to share with you a text and text from People's Daily,

Be sure to see it!

As for the coronavirus pneumonia, one of the most important precautions is to wear a mask.

Most delivery services have been suspended ahead of the lunar New Year holiday, and some pharmacies have sold out of face masks. Can't buy a mask how to prevent? What kind of mask can prevent infection? How to properly wear a mask?

Can wearing a mask prevent infection?

There are several common types of masks: cotton masks, disposable masks (such as surgical masks), and N95 masks.

Disposable mask (medical surgical mask)

Can prevent respiratory tract infection to a certain extent, can not prevent haze.

Surgical masks 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 non-woven cloth. When wearing it, the white non-woven cloth faces in, while the blue waterproof layer faces out. One side of the metal sheet faces up, don't wear it backwards.

When you buy a mask, you should choose one with the word "surgical mask" clearly marked on the outer package.

Type N95 respirator

Can effectively prevent respiratory tract infection, can prevent haze.

N95 masks are one of nine types of respirators certified by NIOSH, the national institute for occupational safety and health. "N" means not suitable for oily particles (cooking oil smoke is oily particles, and people speak or cough droplets are not oily); "95" means that the filtration efficiency is 95% under the testing conditions specified by the NIOSH standard.

N95 is not a specific product name. A product that meets the N95 standard and is approved by NIOSH is called an 'N95 mask'.

The most important feature of the N95 mask is that it can prevent droplet infection caused by the spatter of the patient's body fluids or blood. Droplet sizes range from 1 to 5 microns in diameter. The occupational safety and health administration (OSHA) requires medical personnel exposed to TB bacteria to wear masks that are above the N95 standard.

Compared with surgical masks, N95 masks are more airtight. When choosing N95 mask, try to choose N95 mask without breathing valve.

Plain cotton mask

Its material may be cotton cloth, gauze, wool, canvas and velvet, etc., because the material itself is not dense enough, it cannot play the purpose of preventing infection.

How to properly wear a mask?

For the purpose of self-protection and reducing the risk of respiratory infection, medical surgical masks and N95 masks can be worn.

If you are going to a public place in the open air without contact with patients, you may choose to wear a surgical mask without excessive protection. However, if you will come into contact with patients suspected of respiratory infection, you should wear an N95 mask.

You should wear a mask when you go to the hospital to see a doctor or a patient, especially when you go to the fever clinic or the respiratory department.

In the season with high incidence of respiratory infectious diseases, it is recommended to wear masks in crowded places such as supermarkets, shopping malls and cinemas.

To prevent transmission of the disease to others, wear a mask in case of respiratory symptoms such as fever, cough and runny nose;

In addition, wearing a mask is recommended for outdoor activities in hazy weather.

How to wear masks in special groups?

Pregnant women wearing protective masks, should pay attention to the combination of their own conditions, choose a better comfort products. You should consult a professional physician before wearing it to make sure your condition is suitable.

The elderly and patients with chronic diseases have different physical conditions. For example, patients with heart and lung diseases may feel uncomfortable after wearing them, or even aggravate their original conditions. These people should seek professional guidance from doctors.

Children in the growth and development stage, its face shape is small, it is recommended to choose the regular manufacturer of child protective masks.

How often should a mask be changed?

To prevent infection, some people may wear a medical mask all day long, but this can weaken the mucous membranes of the nose, rob it of its original physiological function and reduce its resistance. Therefore, masks may not be necessary in places with low population density and ventilation.

It should be noted that the protective effect of any type of mask is time-limited and must be replaced regularly. It is recommended to replace the mask every 2 to 4 hours. If masks are contaminated, they should be replaced immediately.

The medical mask should be folded and stored in a self-sealing bag when not in use. It is not recommended to take off the mask and put it directly into the pocket or bag, which may cause secondary contamination of the medical mask. Be sure to fold it into a clean zipper bag and fold the side that touches your nose and mouth inward.