When we breathe, talk, cough, sneeze and even sing, breath aerosols are produced.
These droplets have a small diameter, roughly below 100 microns, equivalent to the width of a human hair, but they contain human cells such as epithelial cells, physiological electrolytes, and various potential infectious agents, such as bacteria, fungi, and viruses.
And sneezing, coughing and other methods are like the launchers of viruses. A simple action will allow viruses or bacteria to continue to spread.
Studies have shown that each sneeze can produce a huge propulsion force, and can expel up to 40,000 individual droplets with a diameter of 0.5-12 microns, which can be expelled at a speed of up to 100 meters per second, and can be ejected as far as Several meters!
Larger droplets are not affected by the gas flow, fall faster and have a relatively short distance within 1 meter; while smaller droplets are suspended in turbulent gas clouds of varying degrees and have a longer range.
And some droplets with smaller particles (under 5 microns) will fly far, and may even float in the air, and it is difficult to say how long these floating in the air can float, so in addition to masks, indoor ventilation Very important.
At the same time, wearing a mask is not only responsible for our own health, but also for the health of others.
How to reduce the transmission risk of sneezing and coughing?
Since sneezing and coughing are so destructive, can you block them with your hands? If we block it with our hands directly, it will contaminate our hands. If we touch other objects with the contaminated hands, we may transmit the virus to the next person.
If you cover it with your elbow or mask, it will reduce the risk of such transmission. There are also some people who use paper towels to cover them. If this is the case, you should throw the paper towels into the trash can in time and wash your hands carefully with running water and soap/hand sanitizer to avoid spreading again.
How to wear a medical surgical mask?
1. Turn the blue side outward
2. Cover the nose, mouth, and chin, and wear the mask behind the ears
3. Put the tips of your fingers on the nose clip, and compact the top metal piece to fit your face
4. Adjust the tightness of the mask
How to wear medical protective mask (N95 mask)?
1. Hold the protective mask with one hand, and turn the side with the nose clip upwards
2. Cover the nose, mouth, and chin with the protective mask, and the nose clip should be up to the face
3. Use the other hand to pull the lower strap over the top of the head and place it under the ears behind the neck
4. Pull the upper strap to the top middle of the head
5. Put your hands on the metal sheet of the mask, press it firmly against your face, and finally cover the mask and blow air. If there is no airflow from behind the ears and between the nose clips, it means that the mask is worn correctly.
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