內容目錄
Since March, the local epidemic prevention and control situation has become increasingly severe.
Beijing Daily (ID: Beijing_Daily) found that from March 6 to 9, 31 provinces, autonomous regions and municipalities and the Xinjiang Production and Construction Corps reported new local confirmed cases and local asymptomatic infections , There have been more than 500 cases for 4 consecutive days, and the number of local asymptomatic infections in these 4 days has exceeded the number of local confirmed cases. Daily new local infections in the past week
Introduced by Lu Jiahai, Director of the Key Laboratory of Quality Monitoring and Evaluation of Vaccines and Biological Products of the State Drug Administration and Professor of the School of Public Health of Sun Yat-Sen University,because the Omicron strain has a longer incubation period , There are many asymptomatic infections, and mild symptoms are mainly after infection, resulting in the outbreak of the epidemic after a period of concealment. The situation of this round of epidemic is complicated, there is hidden transmission, and it is sporadic.
According to incomplete statistics from Beijing Daily (ID: Beijing_Daily), recently, the virus infected by the infected people reported in Beijing, Shanghai, Shandong, Shaanxi and other places all have Omic Rong variant —
Beijing
On March 9, a press conference on the prevention and control of the new crown epidemic in Beijing, Beijing conducted the whole genome sequencing of the sample of infected person 2 reported on March 8. The results showed that the virus It belongs to the Omicron variant (BA.2 evolutionary branch), and has low homology with the previous native and imported cases of Omicron in this city, and is similar to the Omicron reported by other provinces on March 4. Rong cases are highly homologous.
Shanghai
On March 7, it was announced at a press conference on the prevention and control of the new crown epidemic in Shanghai that, after gene sequencing analysis by the Shanghai Center for Disease Control and Prevention, the cases in this round of epidemic in Shanghai were infected with the new crown virus. The virus is a Omicron variant. According to the comparison of the Chinese Center for Disease Control and Prevention, the pathogen of this outbreak is different from the pathogen of the previous local epidemic in Shanghai, and the pathogen of the imported cases in this city. .
Jiangsu Lianyungang
On March 10, a press conference on epidemic prevention and control in Lianyungang City, Jiangsu Province announced that after the Jiangsu Provincial Center for Disease Control and Prevention currently analyzed the genes of the new coronavirus in Lianyungang City cases, the new coronavirus in this epidemic was confirmed. It is the Ormicron variant evolutionary branch.
Shandong
Yucheng, Dezhou: On March 10, a confirmed case of new coronary pneumonia was found in Yucheng, Dezhou, Shandong. It was found that the PCR test of the Dezhou CDC laboratory was Omicron variant, and the confirmed case has been sent to a designated hospital for isolation and treatment.
Weihai City: On March 8, the news conference on epidemic prevention and control in Weihai City, Shandong Province announced that the preliminary results of nucleic acid testing of the first confirmed case in Weihai City were Omicron variant, this variant is highly infectious, more complicated and hidden in transmission, and more difficult to control.
Zibo City: On March 8, the Center for Disease Control and Prevention of Zhoucun District of Zibo City reported 2 cases of positive infection of the new coronavirus nucleic acid test. The nucleic acid test of the Municipal Center for Disease Control and Prevention The results are all Omicron variant.
Shaanxi
On March 8, Shaanxi Province held the 47th press conference on the prevention and control of the new crown pneumonia epidemic. According to the relevant person in charge, the first and second cases of this round of epidemic in Shaanxi Province were business travelers who took flight MU2226 from other provinces to Xi’an on March 1. The gene sequencing results of the infected virus showed that they were all Omicron mutations. The virus strain is highly homologous to the local cases reported by other provinces on March 1, 2022.
Zhejiang
On March 6, at a press conference on the prevention and control of the new crown pneumonia epidemic in Zhejiang Province, Sun Liming, deputy director of the Zhejiang Provincial Health Commission, introduced that the four outbreaks in Zhejiang involved all strains of
strong>Omicron variant.
Shijiazhuang, Hebei
On March 7, according to Zhou Jikun, an expert from the Shijiazhuang Center for Disease Control and Prevention, the source of infection of this round of epidemic in Shijiazhuang High-tech Zone was clear. The first case was a family member of a positive case in Qinghe County, Xingtai City, who was infected as a close contact and caused subsequent transmission. It was in the same transmission chain as the epidemics in Handan and Xingtai, and was the Omicoron strain.
Jilin
Changchun City: On March 9th, Changchun City, Jilin Province held a press conference on epidemic prevention and control. According to the arrangement of the team office, the whole genome sequencing of 11 cases of virus infection in Changchun City has been completed. According to the feedback from the center, it is highly homologous to the virus sequencing results in Jilin City, and is presumed to be the same transmission chain.
Jilin City: Currently, Jilin City has completed the genetic sequencing of the COVID-19 outbreak, the virus gene sequence of this outbreak is Omicron (BA.2 evolutionary branch), and the BA.2 evolutionary branch that caused this outbreak is a branch that has recently become popular around the world. It has the characteristics of relatively mild symptoms, strong concealment, difficult detection, and strong transmission power. The epidemic is in a period of rapid increase, and community transmission has occurred.
Anhui
On March 9, Anhui Province and Anqing City announced that the virus infected by asymptomatic infected persons in Anqing City was identified as the Omicron variant. This is the first case of Omicron infection detected in Anhui Province.
WHO:Omicoron subvariant strain BA.2 is more transmissible
Previously, WHO noted in its weekly epidemiology report on COVID-19 that early research data showed that the Omicoron subvariant BA.2 strain is more transmissible. According to the Danish epidemic data, this sub-variant is 30% more infectious than the original Omicron strain BA.1, but the disease severity it causes is similar to that of the original Omicron strain. There is no difference in comparison.
Currently, the Omicron strain has replaced the delta strain as the predominant strain worldwide. The Omicron variant is highly contagious, and its transmission is more complicated and hidden, making it difficult to prevent and control.
On March 9, at a press conference on the prevention and control of the new crown pneumonia epidemic in Gansu Province, Zhang Hao, director of the Gansu Provincial Health and Health Commission, introduced that the Omicoron mutant strain has the ability to spread It is 2-4 times higher than the previous delta variant, and its reproduction speed in the bronchi is 70 times faster than that of delta. It is very important to do personal protection.
Zhang Hao reminded that Personal protection is still one of the most effective prevention and control measures. It is necessary to develop scientifically wearing masks, washing hands frequently, ventilating regularly, Avoid gatherings, cover sneezes and coughs, try to avoid going to crowded, closed or poorly ventilated public places, and it is a good habit not to get together.
Zhang Hao also reminded that people should be actively vaccinated against the new crown, do a good job in personal health monitoring, do not go out unless necessary, and do a good job of self-examination of personal information.
Studies show: Existing vaccines still protect against Omicron variants
Experts from the China Center for Disease Control and Prevention organized by the National Health and Health Commission have previously introduced that the current research results show that the Omicron variant has not completely immune escape from existing vaccines. ; The existing vaccines still have a certain protective effect on the mutants of Omicron, but their ability to prevent infection has decreased; Existing vaccines are still effective in preventing severe illness and death for the Omicron variant.
In addition, in response to the Omicron epidemic, Zhang Boli, an academician of the Chinese Academy of Engineering, previously suggested that the marketing approval of vaccines specifically dealing with Omicron strains should be accelerated, and the relevant approval procedures should be accelerated. With reference to the test results of China’s Omicron vaccine in foreign countries, clinical trials of vaccines are carried out in China. Universal vaccination can be used as a booster for sequential immunization, so that the entire population can passively form a herd immunity barrier against Omicron virus.
Source: Beijing Daily WeChat Official Account
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