Be wary: Nearly a thousand new infections are added in a single day!What is the difference between the 11 Omikon variants reported in this round of epidemic?

Since July, the total number of cases of outbreaks in my country has continued to increase. ↓

From June 27, an epidemic occurred in Si County, Anhui Province. By July 19, 27 provinces and cities in the territory had reported new crown cases.

On July 19, 935 new positive infections in the territory in the country reached nearly 3.6 times compared to a week ago (July 12), 88%of them were asymptomatic infections.

The epidemic between the two places is on the rising period

From the perspective of new infections in a single day, among 27 provinces and cities, most provinces have a stable epidemic situation, while the epidemic in the Guangxi Zhuang Autonomous Region and Gansu Province are on the rise.

The outbreak of the Guangxi Zhuang Autonomous Region began on July 12. Prior to this, there were scattered asymptomatic infections in Fangchenggang, but they did not spread. On the 12th, the first infection of the epidemic in Beihai City, the number of infections increased rapidly in the next few days.

As of 24:00 on July 19, a total of 1,106 infections had been added in this round of epidemic, most of which were concentrated in Beihai City, including 100%of the correct cases (222 cases), and an asymptomatic infection with 94.5%.

In addition to Beihai City, there are 6 cities in the Guangxi Zhuang Autonomous Region.

According to reports, the Jingui Market of Haicheng District, Beihai City is one of the centralized infection points of this round of epidemic. Because it is one of the largest agricultural and wholesale markets in Beihai City, the traffic is large and the personnel are complicated.

The Gansu Province epidemic began on July 8. As of 24:00 on July 19, a total of 276 confirmed cases were added and 1045 were asymptomatic infected.

The epidemic spread to 10 cities and states in the province. Among them, the situation in Lanzhou was the most severe. Community communication had occurred, and the total number of new cases accounted for 75.8%of the province's cases.

Although from the data point of view, the epidemic in Henan Province and Anhui Province has a recent signs of rebounding, but both can be controlled and controlled, and they have achieved zero society.

The epidemic in Henan Province was mainly concentrated in Zhumadian City. On July 9th, the epidemic was stable. After that, the epidemic was relatively stable. The average number of new cases in a single day was about 35 cases. On July 19, the number of new cases increased again, and 127 newly added asymptomatic infections.

But overall, the Henan Province epidemic is in the controllable stage. According to the Zhumadian City Government on the afternoon of July 19, the epidemic situation has achieved zero society in this round, temporary control in the central urban area has been lifted, and the order of production and living order is in an orderly manner.

The Anhui Province epidemic is divided into two stages. Before July 14th, it was mainly Si County, Suzhou, and the number of new cases in the province was 292 cases (July 2), which continued to decline.

On July 14, Si County had been infected with positive social positives for six consecutive days and relieved static management.

After July 15, the epidemic in Anhui Province was mainly Huaiyuan County, Bengbu City. As of July 19, a total of 387 new cases were added, accounting for 92%of the new cases in the province.

On July 19, Huaiyuan County also achieved a clear society.

In addition, although there are new cases in Shanghai, Sichuan, Guangdong, Guangdong, Jiangxi, Jilin Province, and Tianjin, they have not increased significantly, and they are in a relatively stable state as a whole.

The rest of the provinces and cities are sporadic cases and have not spread.

11 kinds of mutant strains

As of 24:00 on July 19th, according to incomplete statistics, 11 new types of Omikon -type mutant strains have been reported in 13 places in the territory.

Among them, there are 6 places for the evolutionary branch of Omikon BA.5, and 6 places for BA.2 evolutionary branch. Tianjin not only has the above two strains, but also reports the BA.4 evolution branch on July 6.

In terms of refining, there are 5 strains under the BA.2 evolution branch, including BA.2.3, BA.2.12.1, BA.2.38, BA.2, BA.2.2; There are 4 strains, namely BA.5, BA.5.2, BA.5.1, BA.5.2.1.

According to the information published by the Health Commission of various places, the correlation of this epidemic is not great, and the source is mostly foreign countries and regions.

Shanghai BA.5.2.1 mutant strain is an overseas entry -associated infection. 4 variation strains are inbound closed -loop management personnel and the BA.5.2 mutant strains in Xi'an also come abroad.

There is not much difference between viruses

Although these strains have different names, if they belong to the same strain, the actual differences are not large.

Jin Dongyan, a professor and virusist at the School of Biomedicine, University of Hong Kong, said that from a structural point of view, the differences between BA.2.12 and BA.2 are very small, with only 2 amino acid positions, so the basic characteristics are similar, including communication Ability and immune response.

The Lanzhou epidemic was Omikon BA.2.38. It was discovered in India on January 7, 2022, but it was not spread globally. India.

According to the announcement of the Indian SARS-COV-2 Genomics Alliance, the mortality and hospitalization rate of this mutant strain did not increase. After entering June, the dynamic disease mortality rate at 7 days was at a low value and was relatively stable, remained at about 0.2%.

Chengdu is Omikon BA.2.12.1. It was detected in the UK on March 23 this year. Since then, it has spread rapidly in the United States and has become the main poison. 4), then replaced by BA.5. According to data from the US CDC, BA.2.12.1 spreads faster, 23%-27%higher than BA.2.

However, the mortality rate has not improved significantly. When it is the main strain (May to early June), the mortality rate of the United States is relatively low, between 0.2%and 0.4%, but only two months ago only two months ago (March 21), the peak of mortality in the United States is as high as 2.81%(BA.1, BA.1.1 is the mainstream strain).

In the same way, many strains under the BA.5 mutant strains are also minimal.

In comparison, the differences between BA.4, BA.5 and BA.2 are slightly larger, and there are 3 changes in amino acid positions. Therefore, the spread of BA.5 is faster than BA.2, but the mortality rate and hospitalization rate are not much different from BA.2.

It is worth noting that no large differences also indicate that the pathogenicity of BA.5 has not weakened.

Member of the National Health and Health Commission medical institution infection and control of the Expert Committee of the Infection and Control of the National Health and Health Commission, Gao Xiaodong, deputy director of the Infectious Management Department of Zhongshan Hospital affiliated to Fudan University, said that if large -scale infections occur in BA.4 and BA.5 mutations, for the elderly with basic diseases, for the elderly with basic diseases, Still fatal.

Therefore, in addition to the original "three -piece set" and "five more", Gao Xiaodong advocated people to actively implement the "new epidemic prevention three -piece set" -miri regular measurement of acid, vaccination new crown vaccine, and active scanning code.

Liberation Daily · Shangguan News Original manuscript, reprinting without permission

Author: Lian Junxiang Huang Jiayu

WeChat editor: Miss Pi

School counterpart: Jia Simin

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