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Original title: Expert: The virulence of the mutant virus has not changed, it is preventable and controllable
The latest news from the 215th press conference on the prevention and control of the new corona pneumonia epidemic held in Beijing today (20) afternoon: on January 19, the Municipal Center for Disease Control and Prevention of Beijing reported 2 local confirmed cases of new corona in Daxing district on January 17. Virus samples were sequenced and analyzed, the two confirmed virus cases are believed to be variants of the new coronavirus discovered in the UK.
In response to questions about how to prevent mutated viruses, Feng Zijian, deputy director of the Chinese Center for Disease Control and Prevention, mentioned in response to reporters: The new coronavirus is an RNA virus. RNA viruses have the characteristic that their genetic sequences are prone to mutations. For RNA viruses, this virus mutates. It is a very common phenomenon. The new coronavirus has mutated since its discovery. Some mutated viruses disappeared during the spread of the virus, while some survived. Of course, some have developed into a regional or widespread epidemic of a dominant dominant virus. Most of the new coronavirus mutations do not have an obvious impact on the virus’s transmission capacity, virulence, virulence, and antigenicity. Some mutations can have an impact on these important characteristics of the virus. Recently, the new mutated coronaviruses reported in the UK, South Africa and Brazil have attracted global attention. The main reason is that mutations in these viral genes have caused changes in multiple amino acids of the viral peak protein. The pico protein and the virus The ability to invade human cells and the immune response of the human body are related to the mechanism of prevention of epidemics Any change in this important position of the virus structure requires great attention.
At present, international surveillance and research has found that the transmission capacity of the mutant virus in the UK, South Africa and Brazil appears to have increased and the spread is gradually expanding and has become the main epidemic virus spreading in some areas. The virus is reported to have spread to more than 50 countries. The virus in South Africa has spread to almost 20 countries. Its spread is still spreading. However, current research and monitoring have not found that it is these mutant viruses that cause the virulence of the virus. Virulence mainly affects the severity of the disease, which is mainly reflected in changes in the hospitalization rate, the incidence of severe disease, and the mortality rate. At present, the virulence of this virus has not been seen to be affected and there is no viral antigen. Significant changes in sexuality refer mainly to changes in the protection of induced antibodies or cellular immunity. So these research results mean that the transmission of these mutant viruses that occurred in the UK in South Africa may be easier, and it is difficult for us to prevent and control. It will increase accordingly.
Now it seems that these mutant viruses have not caused changes in the clinical characteristics of the disease, nor have they increased the severity of the disease, that is, the number of severe cases has not increased. Furthermore, laboratory studies and epidemiological studies have also shown that these mutant viruses have not been found to significantly affect human immunity established by natural infection or vaccination. In response to the mutation of the new coronavirus, the World Health Organization is actively promoting and coordinating the world to further strengthen and improve the monitoring mechanism of the evolution and mutation of the virus, improve the gene sequencing capabilities of countries. members and timely monitor and evaluate the hygienic and public health importance of the virus mutation and its Based on this, it makes recommendations to the international community to adjust and strengthen response strategies.
Our country attaches great importance to the phenomenon of the mutation of the virus during the new corona pandemic and the global pandemic, and has always maintained a high degree of alertness. At present, the various prevention and control strategies and measures adopted by our country to avoid foreign imports and internal rebounds make it possible to detect and control viruses in a timely and effective manner, especially the entry of mutant viruses and the early transmission they cause. As long as we persist in implementing our current prevention and control measures, these prevention and control measures primarily include the timely detection and detection of infected patients and people, timely diagnostic reports, and timely close contacts of infected people. Now we also include others. Close contacts of close contacts must be monitored and managed in a timely manner, including those communities at high risk of transmission, and strict control measures must be taken. As long as these measures are in place, their prevention and control can cause the disease. The spread is effectively controlled. (CCTV reporter Luo Ziying Yu Jingjing)
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