Recently, US media asked the health commission whether China has considered giving up or stopping the zero tolerance policy? The Health Commission said that China's overall prevention and control strategy of "external prevention input and internal prevention rebound" and a series of prevention and control policies and measures are in line with national conditions and the scientific law of epidemic prevention and control, and have well coordinated epidemic prevention and control and economic and social development. Although the epidemic situation in China is becoming more and more serious, some western media are pointing fingers at China's "dynamic zero" anti epidemic measures. Is dynamic zeroing suitable for a densely populated country like China? If China abandons the strategy of dynamic zero clearing, what will the local COVID-19 enter? Perhaps the answer can be found from the experience and lessons of some countries. Start a new model of prevention and control, and the epidemic in South Korea is now rebounding In November 1st, the South Korean government launched a "phased recovery of daily life" epidemic prevention and control mode, and plans to cancel all restrictions on the COVID-19 period by the end of February next year. In the first phase of the three-stage plan, people can participate in the gathering, whether vaccinated or not, but the scale shall not exceed 10 people. In addition, basic preventive measures such as wearing masks indoors are still effective. Except for entertainment facilities, curfews in restaurants, cafes, cinemas and other business places have been cancelled. Bars, nightclubs and other high-risk places have introduced the "vaccine pass" system, so that people who are fully vaccinated or whose nucleic acid test results are negative can enter freely. Since the launch of the new model, the number of critical illness cases in South Korea has increased day by day. In just 10 days, there were 460 critically ill cases, a new record. On the 10th, the number of newly confirmed cases also rebounded to more than 2400, a sharp increase compared with the number of newly confirmed cases the previous day. The Korean epidemic prevention department believes that loose epidemic prevention measures have led to the expansion of the scale of confirmed cases. Due to the early vaccination time of the elderly, the protection effect has been reduced. In addition, due to seasonal factors, the elderly are facing higher health risks. Relevant departments warned that under this new model, South Korea may have more aggregated infections. The novel coronavirus pneumonia, which was held in November 10th by the State Council Premier Kim Fu Qian, said that the current deterioration rate of the new Korean crown pneumonia cases, death cases and basic reproduction numbers were all higher than expected. Some scholars in South Korea believe that the epidemic situation this winter will be very severe and the number of severe patients will continue to increase. However, it is regrettable that the government has not formulated the standard of "emergency plan" and thinks that the current medical system can respond to the epidemic stably. Singapore has experienced a difficult 100 days to coexist with the virus Due to the proper control of the epidemic situation, Singapore has always been known as a model student in epidemic prevention. However, from August 10 this year, Singapore began to coexist with the virus and plans to gradually open up economic, social and tourism activities in four stages. On October 9, Singapore Prime Minister Lee Hsien Loong delivered a national speech, saying that considering the infectivity of delta mutant strain, the "clearing" strategy was no longer feasible, and stressed the importance of reopening the border and the strategy of coexistence with the virus. What is the response to the epidemic in Singapore after giving up the clearing strategy for more than three months? According to the data, 40 cases were newly diagnosed in Singapore on August 20 and 2069 cases were newly diagnosed on November 16. From the outbreak of the epidemic to August 20, more than 60000 cases have been confirmed in Singapore. In just three months, the number of confirmed cases has increased to more than 240000, nearly four times. Some media even said that Singapore had experienced the most difficult 100 days since the outbreak of the epidemic, and many people said they were "overwhelmed". After unsealing, the number of new cases surged once, and the British strategy was facing a severe test Despite the high infection rate, the UK still lifted almost all COVID-19 restrictions in the summer. The British government believes that this is reasonable because the rapid introduction of vaccines weakens the link between infection and severe illness. After unsealing, the number of new cases in the UK once surged, reaching 54674 in a single day. Since November, the number of new cases on that day has decreased for the first time, but the number of new cases on a single day is still between 30000 and 40000. With the advent of winter, a new wave of outbreaks has occurred in many countries in Western Europe, and some countries have started new blockade policies. Britain's strategy of coexistence with the virus is facing the most severe test. Even so, Britain still puts all its eggs in the "vaccine" basket. On the afternoon of November 15 local time, British Prime Minister Boris Johnson held a press conference and announced that the promotion and vaccination scope of the third dose of Xinguan booster vaccine will be expanded from groups aged 50 and above to groups aged 40 and above, and minors aged 16 to 17 can also receive the second dose of vaccination. He also said that according to the current epidemic data, the British government believes that there is no reason to enter Plan B and strictly block it. (outlook new era)