Explanation 丨 Omikon BA.5 mutation plants have these three problems in our country to take you to know it

Zhejiang News Client reporter Zheng Wen

At present, Omikon BA.5 Asian branches are becoming the major epidemic strains in the world, and it has triggered a local gathering epidemic in my country, and the situation of preventing and control is severe and complicated. How does Omik Rongxin strain produce? What are the characteristics? How to prevent it? The reporter combed you.

How is Omikon's new strain produced?

Since December 2021, the mutant strain of the new crown virus Omikon has become the main epidemic strain in the global new crown pneumonia, which has caused a popular peak of the world from December 2021 to March 2022.

On May 18, 2022, the World Health Organization listed the sub -branch of the six Omikon variants as "the division of concerns in the monitoring", including 4 types of BA.4, BA.5 and BA.2. Asian branch.

The gene sequence of BA.5 was first uploaded on March 15, 2022, from the nasopharyngeal and oral pharmaceutical swabs from a patient collected on February 25, South Africa.

Since February of this year, the major virus strains in my country are Omikon BA.2 Asian branches. In May, for the first time in the input case, Omikon BA.4 and BA.5 were detected for the first time. On July 5th, the Xi'an epidemic detected Omikon BA.5.2 branches; on the 6th, Beijing notified three cases of Olympic Austrian. Local cases caused by the branches of Mik Rong BA.5.2; the virus infected by the infected virus reported by the infection of the infection of the Social Plane in Shanghai on the 8th was Omikon BA.5.2.1 mutant strain, which is an infected person in the overseas entry.

What are the characteristics of Omikon BA.5 mutation?

Zhang Boli, an academician of the Chinese Academy of Engineering, said that the BA.5 strain is not only the most well -known poison strain, but also the latest research found that it has strong immune escape ability and repeated infection capabilities than predecessor strains. The new strain BA.5 has become popular in many countries such as South Africa, Portugal, the United Kingdom, Israel and other countries. It is likely to set off a new round of epidemic peak globally. my country is facing a large external prevention input pressure.

How to prevent Omikon BA.5 mutant strains?

On July 10th, the press conference on the prevention and control of the epidemic in Shanghai in Shanghai mentioned that research data at home and abroad showed that the spread of mutant strains accelerated and the immune escape ability was improved. Compared with the BA.2 of Ke Rong, the risk of critical illness and mortality of the occurrence of critical illnesses was found. The research results also show that vaccination can still effectively prevent critical illness and death after BA.5 infection.

The propagation method of Omikon BA.5 mutant strain is mainly droplet transmission, so individuals still need to keep in mind the "three -piece epidemic prevention" (wearing masks, social distance, personal hygiene) and "protection five" (masks still need to be masks. Wearing and social distances should be left, cough and sneezing are covered, and hands should be washed frequently, and the windows should be opened as much as possible). Among them, the standard mask that standardies is still one of the most effective prevention and control measures.

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