After December entered, all parts of the country "unblocked" and optimized prevention and control measures. Fortunately, it became really good, but many people were worried and didn't know who was the "sheep" outside. They had to take strict protection when going out. Generally, masks are not safe, and they even had to wear N95 masks.
In fact, it is not the same thing. What kind of mask to wear is knowledgeable, not that the higher the protection level, the better it is for people. On the contrary, wearing a mask inappropriately can also have a negative impact on your health.
On August 29, 2022, an old man in Dalian, China wore an ordinary medical surgical mask while taking the bus, and did not wear N95 masks as required, which aroused public anger. A passenger in the car shouted "Impotence". After calling the police, the man was taken off the bus by the patrol officer. During the epidemic, magical things are endless...
? Is this necessary? It turns out there are really regulations - before
, in the 2022 Women's Volleyball Asian Cup group stage held on August 25, 2022, the Chinese Women's Volleyball Team girl wore a mask in the first game, and she had to take the mask to breathe from time to time, gasping for breath, but she lost in the first game.
The girls took off their masks and played naked faces before they won by a big score. This shows that the players wearing N95 masks to play in the game has indeed brought them breathing difficulties, which has led to them being deficient in oxygen during exercise and difficulty in performing at normal levels.
Three years of the epidemic, wearing masks has played an extremely important role in preventing COVID-19 infection. The droplets exhaled by people infected with the new coronavirus and aerosol may contain the new coronavirus. Generally speaking, wearing a mask is to prevent droplets and aerosols from entering people’s respiratory tracts. However, you should also pay attention to how to wear a mask? What kind of mask should you wear? There are still some things to pay attention to -
Currently, basic research has confirmed that in a confined space, the farthest distance that exhales aerosols and droplets that are infected with the new coronavirus can spread the virus will not exceed 1.5 meters. In other words, in a confined space where air does not circulate, the distance between people will be safe if it exceeds 1.5 meters. Usually, people only need to wear masks in closed indoor public places with dense crowds.
. Outside the air circulation, people infected with the new coronavirus exhaled droplets and aerosols and were quickly diluted by the air. As long as people are kept at a distance of 1 meter between them, it is safe. Therefore, under normal circumstances, people do not have to wear masks outdoors where air is circulating, nor do they have to wear expensive and heavy N95 special protective masks.
General surgical masks have a three-layer structure that can block nearly 90% of droplets. The protective effect is not much different from that of N95. However, the ventilation performance of general surgical masks is much better than that of N95 protective masks. So, ordinary people just wear ordinary surgical masks in public places. There is really no need to wear thick N95 protective masks.
On September 8, 2021, the Comprehensive Group of the State Council’s Joint Prevention and Control Mechanism for Responding to the New Coronavirus Pneumonia issued the (Comprehensive Distribution of Joint Prevention and Control Mechanism [2021] No. 96) file. The scope of use of N95 masks, that is, medical protective masks, nucleic acid sampling staff, nucleic acid sampling staff, surgery or emergency surgery staff, staff at designated isolation areas for confirmed cases, fever clinic staff, staff at the new coronavirus nucleic acid testing laboratory staff, and staff at the new coronavirus infection transport staff at the new coronavirus infection. In addition, even in the hospital, ordinary people do not need to wear N95 masks.
Why doesn’t the country require everyone to wear N95 masks? The process of breathing in
is to first inhale fresh air, and some particles in the air will be blocked by the airway cilia. Then, the air is exchanged in alveolar . The oxygen in the air binds to hemoglobin in the blood, and releases carbon dioxide , and finally exhale the waste gas containing carbon dioxide through the mouth and nose.Wearing a mask will intensify the circulation of exhaust gas inside the mask and between the lungs, allowing it to inhale into the air in the lungs, and the oxygen concentration will be lower than that in the air outside the mask.
And the higher the protection level of the mask, the worse the ventilation, the greater the possibility of harm to people. In mild cases, there is a lack of oxygen, and in severe cases, it may lead to " carbon dioxide poisoning ". Moreover, inappropriate wearing of masks for a long time can also have side effects, which can lead to hypoxia and heart rate disorders in people. This is particularly obvious in some elderly people with poor lung function in and .
people wear masks, which will inevitably lead to hypoxia. However, people's daily activities, oxygen consumption is not large, and the human body can compensate, and the feeling of hypoxia is not obvious. However, as long as you increase your exercise volume, the problem of hypoxia caused by wearing a mask will be immediately highlighted, and brain deficiency will cause danger. In the early stages of the epidemic, many schools required students to wear masks when taking physical education classes, and there was a case of students fainting on the spot while running. Since the outbreak of
, people have also observed in various places that they have suffered cardiac arrest or sudden death of while running while wearing N95 masks. Many such sudden death cases can also be searched in medical journals. Since the epidemic, it has also happened frequently around the world. Of course, not everyone will feel hypoxia when wearing a mask, and it also depends on their personal physical condition. However, the fundamental purpose of epidemic prevention and control is for the health of the people, and wearing masks is just a means, as long as it is appropriate.
Moreover, in addition to the respiratory transmission route, the new coronavirus also has objects in public places through hands, or patients' droplets left on their hands, and then touching the eyes, mouth and nose are all ways to cause infection.
Even if you wear N95 masks, the protection level of mouth and nose has been improved. If you do not implement standardized disinfection measures on your hands and the protection level of your hands does not keep up, even the most advanced masks will be considered in vain~
On December 7, 2022, the Comprehensive Group of the Joint Prevention and Control Mechanism of the State Council held a press conference to issue the "Notice of on Further Optimizing and Implementing the Prevention and Control Measures for the New Coronavirus Pneumonia Epidemic ", also known as the "New 10 Regulations". Officially announced: will no longer check "two codes and one certificate" except for special places (health code, itinerary code, verification certificate) ! The cross-regional mobile personnel will no longer be inspected, and "field inspections" will no longer be carried out.
At the same time, it is required that all parts of the country should implement it in accordance with the precise implementation. Keep small steps and continuously optimize prevention and control...
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