Dynamic zeroing does not mean zero infection, but it means reducing the flow of people, gathering people and slowing down everyone's speed in the hardest hit areas. The aim is to control the epidemic at the lowest cost and the fastest speed. At present, the epidemic situation in China is grim, and the epidemic form is grim, among which Shanghai is the most serious. 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 time, environment and place, and comprehensively use methods to solve practical problems, 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 according to 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 people abroad have achieved large-scale immunization one after another, but they have also paid a great price, and the background of large-scale immunization 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 virus spreads faster after mutation, which is a severe test for the prevention and control of big cities and small villages. Therefore, epidemic prevention and control is nationwide. As long as one place is ignored, the whole epidemic prevention and control will be controlled. At the same time, vaccines and COVID-19 drugs need to be considered and weighed.

Even problems involving the field of public health need all-round and multi-dimensional consideration. Drugs and vaccines have solved the pain of patients, while public health involves many problems. Therefore, to take dynamic zeroing as a strategic goal, tactically, it needs to be considered according to time, place and situation. Only after consideration can some problems above the epidemic be solved and the epidemic can be better controlled.