This time of year is a time of high incidence of various respiratory diseases. After the epidemic, influenza, mycoplasma, syncytial virus and pneumonia bronchial infections appeared one after another. Not only the elderly and children and other susceptible people are recruited, but even the young and middle-aged people who are strong and strong are frequently knocked down. Walking through the streets of Beijing over the weekend, I found that most people have consciously put on masks. After the epidemic prevention battle, people are already familiar with things such as wearing masks and daily disinfection, and have developed a high level of hygiene Xi. Through physical isolation and alcohol disinfection, it may be possible to effectively reduce the probability of infection in the human body. However, it seems that when each wave of the virus came, it still did not escape, but the time was sooner or later. In this way, wearing a mask seems to be a kind of psychological comfort for self-deception. In people's consciousness, they are all talking about illness and discoloration, and no one wants to take the initiative to get sick, and no one wants to take the initiative to contact the virus. 
However, the existence and evolution of viruses in the world proves that these are not subject to the subjective will of human beings. Even if humans are primates, even if they have modern civilization, they are still vulnerable to viruses. It is impossible to completely eradicate the virus, and the only way is to coexist. We should also change our mentality in the face of the virus, and we should not worry too much about the virus that will not be fatal. After they enter the human body, they may cause discomfort, fever, and cough, but this is also the only way for the human body to adapt to the evolutionary rhythm of nature, just as every child will fall when he learns to walk, and will experience ups and downs before he matures. In the live broadcast of Zhang Chaoyang's dialogue, Yin Ye, CEO of BGI, talked about the recent flu phenomenon, saying: People are not as clean as possible, but they still need to have more contact with nature. Hygiene is a good thing, but not overdone, not as clean as possible. For example, compared with children in rural areas, urban children must be more clean, and the people and things they come into contact with every day are neat and hygienic, while children growing up in rural areas are all crawling all the way, their clothes have not been clean, and they come home from school every day with a dirty face. However, in terms of physical fitness, children in the city are far inferior to those in the countryside. Children in rural areas have more access to nature, to a deeper extent, and drink water from groundwater, which may have bacteria;Playing in the field, there must be dust;I don't pay attention to eating, and I pick it up and put it in my mouth if it falls on the ground. They have more exposure to bacteria and viruses, and although they don't look clean on the outside, they are stronger on the inside. The human body is a sophisticated system with its own immune system, just like a national military force. Every contact with the virus is a kind of actual combat and a kind of exercise. 
There is a very popular anime drama "Working Cells", which shows the battle process between white blood cells, T cells and macrophages and viruses in the form of cartoons, and finally records the information of the virus destroyed in the memory cells for rapid elimination next time. It can be seen that the body's immunity is not cultivated by rest, but accumulated by actual combat. If it is too clean and keeps out the body even viruses and bacteria that are less powerful, then the opportunity to improve immunity is lost. People can't change nature, after all, they have to adapt to nature, and have more contact with nature in order to adapt to the evolutionary intergenerational rhythm of viruses and bacteria, and to simultaneously improve the body's immunity. Loving cleanliness too much is tantamount to closing the country and giving up the opportunity for immunity to grow. By the time the high-risk virus came in, it was only a beating. 
Life is the same, don't be a flower in a greenhouse, dare to experience the ups and downs in nature. Thunder, rain and dew are all heavenly blessings. This is the way of heaven, and conforming to the way of heaven is the wisest way of life.