Recently, local clustered epidemics have been reported in many places across the country, with multiple transmission chains, and the epidemic prevention and control situation is severe and complex. The Comprehensive Group of the Joint Prevention and Control Mechanism of the State Council has dispatched working groups to relevant provinces to guide local governments to control the epidemic with the shortest time and minimum cost.
must adhere to the principle of "preventing imports from outside and rebound from inside", adhere to "dynamic zeroing", strictly implement the ninth edition of the prevention and control plan and the "nine no-accuracy" requirements, and never relax and do a good job in normal prevention and control, take the initiative to prevent, early detection, and quickly deal with it, comprehensively improve the work efficiency of the entire chain, strive to be scientific and accurate, and strive to facilitate the people. The transmission power of
BA.4 and BA.5 sub-branches
has slightly increased compared with other variants
chief virology expert in the Chinese Center for Disease Control and Prevention, and the transmission power of BA.4 and BA.5 sub-branches have slightly increased compared with other Omickron variants, mainly manifested as:
1. Studies in some international countries have found that the virus has a higher regeneration index (R0);
2. Some countries and regions have become prevalent prevalent strains of prevalence;
3. In the past five weeks, the number of infections has increased in Europe and North America. The pathogenicity of the
BA.4 and BA.5 sub-branches is generally similar to other Omickron variants, but the rapid spread in the elderly population has shown severe cases, with recent hospitalization and ICU usage in 12 European countries. Epidemiological mathematical model studies show that the infection rate and mortality rate caused by the BA.4 and BA.5 sub-branches will increase.
Although the transmission power of the BA.4 and BA.5 subbranches have been enhanced, they still belong to the Omickron variant strain, and there is no evidence that the existing NPI (non-drug intervention) measures will be ineffective. In other words, my country's existing prevention and control measures can still be effectively responded.
Revised the prevention and control plan
mainly considers these three points
First-level inspector of the National Health Commission's Disease Control Bureau, He Qinghua introduced that in the ninth edition of the prevention and control plan, the first is to optimize and adjust the isolation and control period and methods of risk personnel. The second is to unify the standards for demarcation of the control and control areas and medium- and high-risk areas, and clarify the control measures. The third is to improve the epidemic monitoring requirements, encrypt the frequency of nucleic acid testing for risky people, and clarify the strategies for regional nucleic acid testing in different scenarios.
These revisions are mainly based on three considerations:
First, it is based on the needs of the epidemic prevention and control situation. The new crown pneumonia epidemic continues to spread around the world, especially since this year, the frequency of local epidemics in the country has increased significantly. The regions and scope of the epidemic have spread to a wider range. The pressure of my country to "prevent imports from outside and rebound from inside" has continued to increase, and the prevention and control situation has become more severe and complex.
2 is based on the characteristics of virus mutation. The Omickron mutant strain has become an advantageous endemic strain for imported and local epidemics in my country. The Omickron mutant strain has a short incubation period, stronger virus transmission ability, faster transmission speed, and enhanced occultness, which brings new challenges to epidemic prevention and control.
3 is based on the results of the previous pilot work and the summary of experience in epidemic prevention and control. The Comprehensive Group of the State Council’s Joint Prevention and Control Mechanism carried out a four-week pilot work on the optimization of the prevention and control measures for the new crown pneumonia epidemic in seven inbound cities including Dalian, Suzhou, Ningbo, Xiamen, Qingdao, Guangzhou and Chengdu. At the same time, we have absorbed and learned from the practice of prevention and control work and epidemic response experience in various places.
Isolation control time for incoming personnel is adjusted
Disease Control Explanation Causes
Researcher at the China Center for Disease Control and Prevention Department of the Chinese Center for Disease Control and Prevention, introduced that the pilot study found that the average incubation period of the Omickron mutant strain was shortened, mostly 2-4 days; most infected people can be detected within 7 days.Then, the isolation and control time for close contacts and incoming personnel will be adjusted from "14-day centralized medical observation + 7-day home health monitoring" to "7-day centralized medical observation + 3-day home health monitoring"; the close contact control measures for close contacts will be adjusted from "7-day centralized medical observation" to "7-day home medical observation". This adjustment is a further optimization of prevention and control measures based on the epidemic characteristics of the Omickron mutant strain, and will not increase the risk of epidemic transmission and is a reflection of precise prevention and control.
Source: Beijing Daily Official Account | Reporter Sun Leqi Intern Reporter Chai Rong
Process Editor: U016
