The specific steps are as follows:
1, before wearing a mask, you should distinguish between the positive and negative.
2. The side with metal strips is the top.
3. The masks with three floors down in the middle are outside.
4. Light color is inside.
5. Hang the strap of the mask on your ear.
6. Gently press both sides of the alar by hand to make the metal strip conform to the shape of the alar.
7. Pull down the mask and cover your chin.
8, fully dressed.
Extended data:
How long can the mask last?
From the physiological structure of human body, because the blood circulation of nasal mucosa is very strong, the passage in nasal cavity is very tortuous, and nasal hair constitutes a "barrier" for filtration.
When air is inhaled into the nostrils, the airflow forms a vortex in the tortuous channel, which warms the airflow inhaled into the nasal cavity. Experiments show that when cold air at minus 7℃ is inhaled into the lungs through the nasal cavity, its airflow has been heated to 28.8℃, which is very close to the temperature of the human body.
If you wear a mask for a long time, it will make the nasal mucosa fragile and lose the original physiological function of the nasal cavity, so you can't wear a mask for a long time. Masks can only be worn in special circumstances, such as crowded places with poor ventilation. Of course, you need to wear a mask when walking in the wild, in order to prevent wind, sand and cold, or to move in an air-polluted environment, but the time should not be too long.
In addition, in the flu season, you should wear a mask when you go to public places where there may be a lot of pathogenic bacteria. Wearing a mask is only one of the ways to prevent respiratory infectious diseases, and the most important thing is to maintain good living habits.
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