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Wu Fan said that dynamic zeroing depends on time, situation and location. How can we achieve dynamic zeroing?
Dynamic zero clearance does not mean zero infection, but it means reducing the flow of people, reducing crowd gathering and slowing down all the people in areas with serious epidemics. The aim is to control the epidemic at the lowest cost and the fastest speed. At present, the epidemic situation in China is serious, especially in Shanghai. Wu Fan, a member of the Shanghai epidemic prevention and control team and vice president of Fudan University School of Medicine, said that the current epidemic situation in Shanghai is very serious. To realize dynamic zero clearing, we must consider from many aspects, measure from many dimensions, consider from time, situation and place, and solve practical problems by comprehensive methods, and finally realize dynamic zero clearing.

Although there is a vaccine now, and most people have been vaccinated successfully, the virus is still changing and spreading faster. People hope that the infectivity of the virus can be reduced, but judging from the development trend of the virus in the last two years, the sustained development of this virus will become a common event. From the perspective of big data, some foreign people have achieved group immunity one after another, but they have also paid a great price, and the background of group immunity is different.

In this regard, Wu Fan said that the current prevention and control measures should be considered according to time, situation and place. At present, the mutated virus spreads faster, which is a severe test for the prevention and control of big cities and small villages. Therefore, epidemic prevention and control is national. As long as one place is ignored, the whole epidemic prevention and control will be controlled. At the same time, COVID-19's vaccines and drugs need to be considered and weighed.

In addition, the problems involved in the field of public health also need all-round and multi-dimensional consideration. Drugs and vaccines solve patients' ailments, and public health involves many aspects. Therefore, it is necessary to take dynamic zero clearing as a strategic goal, and tactically it needs to be considered according to time, place and situation. Only after consideration can we solve some problems above the epidemic situation and better control the epidemic situation.