Infectious!Where does the BA.5 mutant strain from local dissemination come from?

BA.5.2 spreads faster and more contagious.

In the past few days, in many places, the local epidemic was reproduced. In Xi'an and Beijing's Xinfa epidemic, the virus gene sequencing of the infected person pointed to the more spreading Omikon BA.5.2 branch.

Data map: Big Wild Goose Pagoda. Photo by Zhang Yuan

29 cases were added in 4 days,

Xi'an enters "7 days of temporary control"

At 0-24 on July 5th, 1 newly reported local diagnosis cases and 10 asymptomatic infections in Shaanxi were in Xi'an. According to the information published by the Shaanxi Provincial Health Commission. The test results of the nuclear acid test were positive, and the rest were screening during the centralized isolation.

Earlier, from 0:00 on July 2nd to 24:00 on July 4, Xi'an had reported a total of 10 local diagnosis cases and 8 asymptomatic infections.

Faced with the emergence of the epidemic, Xi'an announced that since 0:00 on July 6, the city has implemented 7 days of temporary management and control measures. Zhang Xuedong, deputy director of the Office of Xi'an Epidemic Prevention and Control Headquarters and Deputy Secretary -General of the Municipal Government, said that 7 days of temporary management and control measures are to calm the society as much as possible, reduce social liquidity, quickly find potential risks, reduce cross -cross The risk of infection.

"Because Omikon's mutant strain is more contagious, the transmission speed is faster, and some infected people have no symptoms or symptoms and are not typical, so they are more concealed during the spread." Zhang Xuedong said.

As of 12:00 on the 6th, there were 9 high -risk areas and 10 medium -risk areas.

Data map: A woman handed her virus sampling tube to the medical staff. Photo by Jia Tianyong, a reporter from China News Agency

The BA.5 mutant strain that must be vigilant

One of the most important reasons why this wave of epidemic in Xi'an has attracted much attention comes from the results of this epidemic virus sequencing. According to gene sequencing, the strains infected by the positive infection of the Xi'an epidemic were branches of the Omikon mutant strain.

On the 6th, the Beijing epidemic conference also introduced that the illness and control department carried out gene sequencing the specimen 1 to 3 of the infected persons reported on July 5th. The results showed that the virus belonged to the BA.5.2 branch of Omikhon mutation.

Since December last year, the new crown virus Omikon mutant strain has become the main popular strain in the global new crown pneumonia. With the continuous evolution of Omikon's mutant strains, WHO will be 6 on May 18 this year. The sub -branch of the Omicucaro mutation strain is listed as "the proper variable in the evolutionary branch in monitoring", including 4 sub -branches of BA.4, BA.5 and BA.2.

In May of this year, the "China Disease Control Center Weekly (English)" published an online document, reporting the specific situation of the first overseas input of Omikon's mutant BA.5 infection in my country.

The Xi'an epidemic conference held on the 5th was introduced that the popular Omikon mutant BA.5.2 branch of this popular Omikon is more popular than other circulating mutant strains, such as the rapid spread of BA.2 in my country at the beginning of the year, and cases of infection. The CT value is low and strong infectious. This strain has caused a new round of popular peaks worldwide. Therefore, the current epidemic situation in Xi'an is severe and complicated. It does not rule out that a new communication chain will occur in the future, causing the community to renew the risk of dissemination.

At present, BA.4 and BA.5 have become the main popular strains of South Africa, Portugal, Britain, Israel and other countries; recently, many European countries such as France, the Netherlands and other European countries and the United States have also experienced increasing BA.4 and BA.5 infected people. Essence

Wang Wenling, a researcher at the Institute of Virus and Control and Control and Control of the China Disease Prevention and Control Center, introduced on June 28 that recently the Chinese Macau Epidemic Department was caused by BA.5 mutant strains. At present Essence Judging from the existing preliminary research results, the propagation power and immune escape ability of BA.4 and BA.5 of the new crown virus Omikon are slightly enhanced, and the difficulty of preventing and control will increase. big.

Data map: The picture shows a citizen riding in front of Xi'an's bell tower. Photo by Zhang Yuan

Xi'an cases are mostly waste recycling personnel

According to the epidemic conference on the 5th of Xi'an, the virus comes from abroad, but the source is not clear. Because of the main place of this epidemic, Shaanxi Chaohui Renewal Resources Trading Market (Great Frequency Renewal Art Museum) is the largest renewal resource trading market in Shaanxi Province, which involves a wide range of people and complicated personnel.

According to Xi'an's notification, most of the positive infected people currently discovered are related to waste recycling personnel or their relevant personnel. Most of the positive infected people have the history of contact and living together.

In addition, most of the found cases are waste recycling personnel. This professional population has a large scope and many contact personnel. Many cases of activities involved multiple restaurants, supermarkets, communities, large trading markets, high -speed service areas and other personnel. , A large place with liquidity.

However, the early epidemic infected by Xi'an's epidemic infection was found in the routine nucleic acid test of the key personnel who should be inspected, and it was basically in the early stage infection when it was discovered.

According to the Shaanxi Daily, at present, the Shaanxi Chaohui Regenerative Resources Trading Market (Dashang Regenerative Art Museum) has been closed, and 438 people in the market have controlled control, nucleic acid sampling and centralized isolation to comprehensively disinfect the market. The 87 -year -old -time team of Xi'an City streams the 56 merchants in the market and 19 risk points in Chang'an District. More than 1,400 people with a total of 1,400 tanks and sub -densely connected personnel are in place.

Secretary of the Shaanxi Provincial Party Committee and Governor of the Provincial Party Committee in succession

After the epidemic in Xi'an, the secretary of the Shaanxi Provincial Party Committee and the governor of the Provincial Party Committee scheduled and deployed the epidemic disposal. According to the Shaanxi Daily, Liu Guozhong, Secretary of the Shaanxi Provincial Party Committee, emphasized on the 5th in the Xi'an outbreak prevention and control headquarters that the communities determined as a high -risk zone must strictly "not leave home and on -site services", and the community in the central risk zone must be required "People do not get out of the district and peaks," at the same time to ensure the basic needs of the people's living materials, electricity consumption, medical treatment, etc.; in other areas, we must implement normalization prevention and control measures, and we cannot increase layers.

Liu Guozhong also requested that it is necessary to persist in people and things to investigate the same aspects of the closed -loop management of immigration personnel, accelerate the investigation and prevention and control loopholes, and strengthen work measures in targeted manifestations.

On the same day, Zhao Yide, the governor of Shaanxi Province, presided over a video dispatch meeting in the province's epidemic prevention and control, requiring Xi'an to control the epidemic as a hard path, and hold the epidemic disposal window period. Trace the source, comprehensively and efficient tissue nucleic acid screening, and continuously accelerate the transfer of transportation and isolation to ensure that all risk personnel should be separated and not leaked.

He also emphasized that the measures of externally prevention and input measures were strictly strengthened to further strengthen the control and control of the entire process of entry personnel, the full chain of entry -imated items, and resolutely prevent the virus from breaking the ring.

Source: China News Network

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