[Explanation] Recently, it is suspected that the recombinant strain "Delta Chron" of Delta and Omikron has been discovered overseas. Its genes are closer to the Delta strain, but it has a large number of unique mutations of the Omikron strain.

In response to this new strain, the reporter interviewed Lu Jianchun, an expert in virology.

  [Explanation] Lu Jianchun introduced that in the process of virus mutation, the combination of the two strains may indeed occur. It may be that the virus has mutated in the process of reproduction and inheritance in the human body, inheriting the characteristics of the old strain.

  [Concurrent] Lu Jianchun, former senior engineer of the Institute of Microbial Epidemiology, Academy of Military Medicine, Academy of Military Sciences

  It is basically a combination of Delta's strong pathogenicity and Omicron's strong infectiousness, and combining these two characteristics, it should be mutated like this.

Sometimes its mutation will become stronger, sometimes it will become weaker. This thing depends on the size of the role played by the site of its virus mutation, where it is, and the combination with the cells of the human body. the same.

  At present, the harm of this virus is still quite large. These two characteristics should be the most unfavorable to us human beings. They are combined together.

  [Explanation] Lu Jianchun said that researchers have done some research on Delta and Omicron before, and these studies are still valid.

However, some features of the new strain still need to be noted.

  [Concurrent] Lu Jianchun, former senior engineer of the Institute of Microbial Epidemiology, Academy of Military Medicine, Academy of Military Sciences

  One is that the location of the human respiratory tract it invades is different. For example, the virus before Delta invaded the deep part of the lung. This time it is mainly above the upper respiratory tract bronchus.

Therefore, its clinical symptoms are relatively mild, and some are even asymptomatic.

  The other one is that it is easily infected. On the one hand, it is said that it is in the upper respiratory tract, and it is easier to come out through coughing and breathing.

  [Explanation] Lu Jianchun pointed out that under the influence of new strains, the effect of vaccines will decline somewhat, so physical epidemic prevention measures such as wearing masks and maintaining social distance still need to be adhered to.

However, he also believes that "Delta Chron" has not yet been widely spread and has not caused serious practical harm.

  [Concurrent] Lu Jianchun, former senior engineer of the Institute of Microbial Epidemiology, Academy of Military Medicine, Academy of Military Sciences

  It's just that in individual countries (found), this has not spread, it has not formed a dominant strain.

However, it cannot be ruled out that because the research on this new mutation, Delta Chron, is not so in-depth, and there are not many related reports, it is only a concern now, not to say that it has caused such serious practical harm now , now it seems that the real danger is still Omicron and Delta.

  [Explanation] Recently, China has also found a number of cases of infection with the Omicron strain. In this regard, Lu Jianchun emphasized that special vigilance is required.

  [Concurrent] Lu Jianchun, former senior engineer of the Institute of Microbial Epidemiology, Academy of Military Medicine, Academy of Military Sciences

  This is to send a dangerous signal to us that this virus (Omicron) has come to us and has formed a small regional spread in some parts of us.

So from the current point of view of the virus, its concealment is still relatively strong, because it has indeed been passed down to three generations after it was discovered in Tianjin, and no one has discovered it before.

  [Explanation] However, Lu Jianchun also believes that the measures that China has been taking to insist on clearing are effective and effective, and they should have enough confidence and determination to control and clear this wave of Omicron epidemic. .

  Reporter Wen Mengxin reports from Beijing

Responsible editor: [Li Yuxin]

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