The Chinese epidemic is still in a multi -point state, /span> Chief expert of the China Centers for Disease Control and Prevention said that this is since the epidemic of Wuhan, except the Shanghai epidemic.The most severe and complex situation in China's crown disease.notWu Zunyou, chief expert of the Popular disease of the CDC, posted a long article on Weibo on Weibo to explain the reasons for the recent crown disease epidemic.He pointed out that the current severe epidemic situation in China is mainly caused by two reasons: surrounding environment and mutant virus.notFriends said that the center of the past four waves of crown disease is located in India and Southeast Asia, the Americas, and Europe. It is currently in the world's fifth wave of crown disease epidemic. The center of the storm is transferred to the Western Pacific area.notAs a member of the Western Pacific region, due to the severe epidemic of neighboring countries and regions, it is facing tremendous pressure on "external prevention input".He analyzed that this was the main peripheral cause of China's recent severe epidemic situation.notFriends mentioned that the Western Pacific region has become the world's fifth wave of epidemic centers in the world. There is no generally recognized authoritative explanation.There are two majority experts who believe that more reasonable interpretations. One is that most countries in Europe and the United States have relaxed the prevention and control measures of the epidemic.Natural infections occur. This kind of natural infection+vaccine immunization is better than the protection effect produced by pure vaccine vaccination.When the countries and regions in the Western Pacific region were popular in the first few waves of epidemic conditions, the number of naturally infected was relatively small, and it mainly relied on vaccination to obtain immune protection.notFriends also said that the second reason for the severe epidemic in China is the emergence of Omikon's mutant strains, which makes hidden transmission more common and also increases difficulty to prevent control.notIt is explained that it is not clear how the hidden communication occurs, but any infection that cannot be found at the source can be attributed to "hidden communication".notIt is also mentioned that some infected people have the phenomenon of negative and positive alternation of nucleic acid detection. As for what causes, it is not clear. It is necessary to study further.It also needs further research, and this phenomenon has brought great challenges to China's prevention and control.notAt the current situation of the epidemic situation, Sun Chunlan, member of the Political Bureau of the Communist Party of China and vice premier of the State Council, said at a television conference call at the State Council ’s joint prevention and control mechanism on Friday that due to the current high influence of overseas epidemics, a clustered epidemic occurred in many places in China.Measures to control the epidemic as soon as possible.notChunlan demanded that it highlights the external prevention input, the orderly flow of personnel, and the prevention and control of key places. It is found, dealt with quickly, and overflows early, and firmly adhere to the bottom line of the large -scale epidemic, and welcome the 20th National Congress of the Communist Party of China with practical actions.