From Delta to the Olympic Games, COVID-19 continues to mutate and the global epidemic is very high, which brings great pressure to our foreign input. How does the domestic epidemic prevention and control respond to this? The reporter learned from the National Health Commission that China will continue to adhere to the general strategy of "external defense input and internal defense rebound", so as to achieve early detection, rapid disposal, accurate control and effective treatment, so as to ensure that there is no large-scale input and rebound of the epidemic. The existing prevention and control strategies are still effective Recently, some countries have seen COVID-19 mutant strain, "WHO". It urgently called for a special assessment meeting and classified it as a "need concern" mutant strain, requiring all countries to strengthen monitoring and sequencing. Although the danger degree of the new mutant is unknown, China has never relaxed and scientifically and accurately implemented a set of prevention and control strategies and measures to ensure the consolidation of hard won prevention and control achievements. Experts from China CDC organized by the National Health Commission believe that China's "external defense input and internal defense rebound" prevention and control strategy is still effective for Omicron mutant. The above experts also said that wearing masks is still an effective way to block the spread of the virus, which is also applicable to the Omicron variant. In addition, wash hands frequently, do a good job in indoor ventilation, do a good job in personal health monitoring, and reduce unnecessary entry and exit. "Novel coronavirus pneumonia is a novel coronavirus pneumonia, with rapid viral mutation and mortality rate has not dropped significantly." Liang Wannian, head of the expert group of Wei Jian, the new leader of the National Committee of the new crown pneumonia coping group, said earlier that in such a case, the choice of prevention and control strategy in China should first consider the supremacy of the people and the supremacy of life, and put the importance of guarding the people's health in the prominent and important position. The joint prevention and control mechanism of the State Council held a press conference on November 30. Photographed by Xinhua News Agency reporter Dong Ruifeng It is difficult to avoid virus mutation, which deserves high attention "The research shows that the mutation frequency of COVID-19 is about three parts per million, and the new mutation is normal." Qian Zhaohui, a researcher at the Institute of pathogen biology, Chinese Academy of Medical Sciences, said that according to the latest data of China's latest reports, the spread rate of the mutant is indeed very fast, and deserves great attention. However, it is difficult to judge whether it will surpass delta to become a new major epidemic strain based on the current data. Can the current nucleic acid detection reagents effectively detect the Omicron mutant? Xu Wenbo, director of the Institute of viral disease prevention and control of the Chinese Center for Disease Control and prevention, said that genome analysis of the Omicron mutant showed that its mutation site did not affect the sensitivity and specificity of China's mainstream nucleic acid detection reagents. Is the effectiveness of existing vaccines affected? Xu Wenbo said that the immune escape ability of the existing vaccine needs further monitoring and research. However, China has done a good job in the preliminary technical reserve and research for the Omicron variant, including inactivated vaccine, protein vaccine, vector vaccine and other technical routes, and some enterprises have begun the relevant preliminary design. In January of this year, the staff of Kexing Zhongwei examined the label of COVID-19 inactivated vaccine. Photo by Xinhua News Agency reporter Zhang Yuwei Early detection wins time for timely handling of the epidemic The simultaneous interpreting of the stronger strains of variation will take the initiative earlier. The current round of epidemic in China, which began in mid October, was triggered by the import of delta mutant strains from abroad, and many provinces controlled it in an incubation period. Some of these prevention and control experiences can continue to be used to "deal with" new mutant strains. Wu Liangyou, deputy director of the disease control bureau of the National Health Commission, introduced that the National Health Commission has strengthened epidemic situation monitoring and information reporting, and implemented "reporting every Yang, reporting every Yang and checking upon receiving the report". The comprehensive group of the joint prevention and control mechanism of the State Council sent a working group to carry out emergency disposal in provinces with the risk of epidemic spread at the first time, so as to win time for early detection and disposal of the epidemic situation. At the same time, relevant departments have taken more scientific and accurate prevention and control measures to effectively give full play to multi sectoral coordination mechanisms such as special flow survey traceability classes and special regional investigation assistance classes. The national flow survey expert team arrived at the scene at the first time, cooperated with provinces and cities, seized the 24-hour prime time, and quickly identified, investigated and controlled close contacts, sub close contacts and other risk personnel, Effectively prevent the overflow and spread of the epidemic. (reporter Dong Ruifeng, Xu penghang) (outlook new era)