On the afternoon of December 18, the joint prevention and control mechanism of the State Council held a press conference to introduce the scientific and accurate situation of epidemic prevention and control during the New Year's Day and Spring Festival. At the meeting, Liang Wannian, head of the expert group of the National Health and Health Commission's Leading Group for Epidemic Response and Handling, introduced that from August 2021, China began to enter the "dynamic clearance" stage of accurate prevention and control of the whole chain. The prevention and control goal at this stage is to minimize the occurrence of the epidemic, efficiently deal with sporadic cases and clusters of epidemics after the outbreak, and strive to prevent and control the epidemic within a maximum incubation period, so as to achieve the greatest prevention and control results at the smallest social cost.
Liang Wannian introduced that the "dynamic zeroing" stage of accurate prevention and control of the whole chain refers to the adoption of effective comprehensive prevention and control measures when there are cases of local new crown pneumonia epidemics under the premise of following the general strategy of "external prevention and import, internal prevention and rebound", finding and extinguishing together, quickly cutting off the epidemic transmission chain, so that each epidemic is terminated in a timely manner, so that the infected people of this epidemic are "cleared" and achieve a prevention and control goal of achieving the greatest results at the minimum cost. It is a summary of China's experience in prevention and control, and it is also the best choice for the current epidemic prevention and control.
Liang Wannian believes that the meaning of accurate prevention and control of the whole chain can be understood from the three links and two factors of infectious disease prevention and control. Regarding the prevention and control of infectious sources, the first is to implement accurate remote prevention and control and closed-loop management after entry around "external prevention input". At the same time, the spread of goods is accurately prevented. The second is to strengthen monitoring, such as fever clinics to improve the sensitivity of monitoring. The third is to strengthen nucleic acid testing, such as for high-risk positions to effectively achieve "due diligence". The fourth is to strengthen the monitoring of virus mutations and timely discover the mutations.
Regarding the prevention and control of transmission routes, the first is to adhere to the same prevention of people, things and the environment. The second is to adopt precise management of zoning and grading, such as dividing the occurrence of the epidemic into high, medium and low risk areas, and further dividing the sealing, control and prevention areas after the outbreak occurs. The division of these standards should be gradually accurate and gradually reduced. "In the past two years of epidemic prevention and control, from the past province-based epidemic area and epidemic point division, gradually accurate to the city as the unit, the county as the unit, the township and the community as the unit, now we hope to be accurate to the neighborhood committee, accurate to a specific community, so that the control unit is reduced, the relevant control measures are more efficient and effective." Liang Wannian said.
Protection for susceptible people. The first is to go all out to promote vaccination. The second is to vigorously carry out relevant scientific research, such as drug research, further optimization and improvement of detection reagents and detection methods. The third is to carry out patriotic health campaigns, especially to strengthen the improvement of grass-roots prevention and control capabilities and prevention and control levels. In addition, it is necessary to strengthen publicity and education, timely provide relevant information to the public, and carry out targeted knowledge, especially skills training, to enhance the self-protection ability of individuals.
Regarding the scientific connotation of accurate prevention and control, the first is to accurately carry out epidemiological investigation. Only accurate epidemiological investigation, coupled with the combination of big data and related technologies, can we make a more scientific and objective judgment on the determination of the source of infection, the determination of the scope of transmission, the division of epidemic areas, and the trend of the epidemic situation. The second is to accurately carry out disease monitoring and detection. The third is to accurately delineate the scope of the epidemic area. The fourth is to accurately delineate close contacts and implement precise management. In addition to monitoring and managing diseases and symptoms, special attention should be paid to the service of mental health and psychological counseling. Fifth, it is necessary to accurately carry out clinical treatment. Sixth, accurately coordinate epidemic prevention and control and social and economic development.
![National Health Commission: Since August this year, China has entered the "dynamic zero" stage of precision prevention and control of the whole chain[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)