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Share the QR code < / P > < p > with wechat scanning code to friends and circles of friends < / P > < p > < / P > < p > every time Peng Shuiping edited < / P > < p > this weekend, the new crown variant strain Omicron found in South Africa aroused high global vigilance. On November 28, Zhong Nanshan, Zhang Wenhong and Wu Zunyou all expressed their latest views and judgments on Omicron < p > Zhong Nanshan's latest research and judgment is coming < / P > < p > according to Nanfang +, on November 28, the first national conference of respiratory branch of China rare diseases alliance was held in Guangzhou, and Zhong Nanshan, academician of Chinese Academy of engineering, attended and spoke < p > during the activity, Zhong Nanshan introduced in an interview that from the current situation, Omicron mutant has spread rapidly and has been popular in South Africa and other regions. Recently, cases have also been found in Hong Kong, China < p > picture source: South + video screenshot < / P > < p > "this mutant is very new. Although molecular genetic testing has found that it has many changes in the receptor binding site, it is too early to judge how harmful it is, how fast it will spread, whether it will make the disease more serious, and whether it needs vaccine research and development. Now it is too early to draw a conclusion." < / P > < p > Zhong Nanshan said that the harmfulness of Omicron mutant needs to be judged for a period of time and should be paid attention to at any time, but no major action will be taken yet. "Another thing that needs more attention is to prevent and control personnel from relevant places in South Africa." < / P > < p > previously, Zhong Nanshan said on the 27th that he did not know much about the variant virus, but the virus carried a large number of mutations, which also posed more challenges to epidemic prevention < p > Zhang Wenhong: the epidemic situation in Shanghai is coming to an end. The whole network focuses on Omicron < / P > < p > at noon on November 28, Zhang Wenhong also released a microblog to respond to the impact of the new mutant strain < p > the following is the full text of Zhang Wenhong's microblog: < / P > < p > the epidemic in Shanghai is coming to an end, and the whole network focuses on Omicron < / P > < p > the epidemic in Shanghai is coming to an end. The new crown and new mutant Omicron landed in the world and quickly occupied all academic forums and people's canteens. Some views for your reference: < / P > < p > 1. The discovery of Omicron variant is a recent emergency, which is undoubtedly the product of virus evolution. Since the number of mutation points far exceeds that of all variants found, it is expected to be formed after a long period of evolution in the host. Because COVID-19 causes acute infection, it is difficult to survive and evolve long time in immune function, and there is no gene redistribution like influenza virus. Most of the variants are thought to have evolved in long time after immune deficiency, such as AIDS patients. After the formation of new variants, they spread by chance, and quickly exceeded the existing virus transmission capacity, becoming the dominant strain among the recently recorded virus strains in South Africa (accounting for more than 90%) < p > 2. Due to the large number of virus mutation points, it seems to have defeated other virus strains in South Africa in a short time, including delta virus strain. Therefore, out of caution, who has included it in the close attention variant (VOC), that is, it should attract great attention < p > 3. But does this mean that the global anti epidemic efforts have been wasted? It's hard to say now. The total number of virus strains published in South Africa this time is not much. We need to observe more data and laboratory data in the next two weeks to make an accurate judgment < p > 4. The completion rate of vaccination in South Africa is low. The proportion of people who complete the whole vaccination is only 24%, and the natural infection rate is about 4.9%. In fact, it is not enough to build an immune barrier for vaccine and natural infection. Without an immune barrier, there can be no immune breakthrough. In other words, if this situation occurs in Israel today, it can be said that there is no doubt that the global anti epidemic will face the risk of starting again < p > 5. It is clear here why the full vaccination rate of these vaccines in Britain and Israel has exceeded 80%, especially the third vaccination rate in Israel has reached about 50%, and the measures taken by these two countries for foreign input have been suddenly tightened. In other words, in the case of South Africa, once it is clear that the virus strain can break through the original immune barrier, it means that we must adjust all existing vaccine systems and start to enter the influenza vaccination mode, that is, we should quickly build a new vaccine according to the virus changes every year. But it also means that the days will become more difficult < p > 6. According to Reuters, in order to prevent the invasion of the epidemic, Israel announced on the 27th that it would close its borders and prohibit all foreign tourists from entering, becoming the first country in the world to block its borders due to the "Omicron" virus strain. Israeli Prime Minister Bennett said that the ban may last 14 days. This mutant strain is "very worrying". Israel "is on the verge of entering a state of emergency", and everyone should be ready

7.  In this case, it can be judged that the emergence of the variant virus in South Africa is accidental, but it will take about two weeks to observe whether it will pose a threat to the immunity of the currently preliminarily established vulnerable population. The reason why it is initially set within two weeks is that the current global epidemiological data and virus neutralization test data will produce results within two weeks and several weeks. Our Fudan team and several Chinese brother scientific research teams are carrying out these work simultaneously. But I agree with my friend Professor Jin Dongyan, a virologist at the University of Hong Kong, "The variation of COVID-19 is limited. In general, many variants of the new crown have not survived. Even a few of the surviving variants, few of them can become dominant strains. From the outbreak to the present, at least hundreds of mutant strains have been found, but only one delta can stay. In the past, beta and gamma variants were also proved. It has strong immune escape characteristics, but they still lost the communication competition with Delta, and finally disappeared silently. " Long time, China China will not be too long.

finally said, "what should China do?" I think China will not have a big impact on the current situation. China's current quick response and dynamic zero strategy is able to deal with all kinds of new crown variants. COVID-19 is still changing COVID-19 or China. China is now in the strategic opportunity of dynamic zero strategy. During this period, we are accelerating the construction of the scientific support needed for the next stage of response to the normalization of epidemic resistance, including the formation of an effective vaccine and drug reserve sufficient to support the opening of the world, as well as the reserve of public health and medical resources. Based on science and unity, we can deal with Delta and ?
2023-03-22 10:04:47