A month has passed | new health knowledge, what do we know about Omi kerong?

A month has passed, what do we know about Omicron? 】

Since being informally reported to the WHO by Nam on November 24, Omi Kerong has maintained a very high level of attention around the world, so a month later, what new understanding do we have about this new mutant strain?

First, let's talk about the current spread of Aumechjong around the world. Although it is only a short period of one month, based on the current results, there is no doubt that the spread situation in Omikeron is very serious, and so far, the recorded ones have appeared in 89 countries. And basically once there is community transmission, the number of infected patients will double in 1.5-3 days, and basically has nothing to do with whether a certain population immune barrier has been established before.

In the United Kingdom, for example, 10,000 confirmed cases of Omiljung were violently rectified in the past few days. Moreover, people who have been infected with the new crown before, the risk of re-infection in the face of Aomi Kerong is also 5.4 times higher than that of Delta, 73% of the recent new infection cases in the United States are infected With Omilon, the current R0 value of Aomi Kerong is estimated to have exceeded 10, what is this concept? If it is really this value, it can basically be said that it is the strongest virus in human history that has so far seen its spread, and the measles and the previous Delta R0 value are only about 7.

However, according to a report by the National Institute of Infectious Diseases of South Africa on the 22nd, in this wave of outbreaks mainly caused by Omi kerong in South Africa, the risk of hospitalization of patients was reduced by 80% compared with the previous Delta strain, but once hospitalized, the risk of severe illness was almost no different. If similar conditions have been confirmed elsewhere, it means that the pathogenicity of Omilon may become milder, which is also in line with the highly contagious nature of Omilon, after all, the milder the symptoms, the more difficult it is to be found, and the stronger the transmission secrecy.

So for Omi kerong, what about the current effects of various vaccines and boosters? Basically, the results of the current disclosure can only be described as tragic, but they have not yet reached the point of despair. Let's elaborate a little, the so-called tragic, that is, basically the existing vaccines, whether it is RNA vaccines, inactivated vaccines, or recombinant protein subunit vaccines, are basically killed by Omicron. For example, the two-dose Pfizer, compared with the earliest wild-type new crown strain, when facing the Omicron, the antibody titer produced dropped by nearly 25 times... Basically there is no, and the tested serum or after vaccination neutralizing antibody titer should be the peak of the time period, then we know that after vaccination, with the passage of time, the antibodies in the body will further decline, so for people who have been vaccinated for more than half a year, the face of Omicron is basically a naked state, and the relevant results of Sinopharm and Koxing vaccines are similar.

But why is it not desperate yet? Because it was found that the booster needle is still useful, basically after the third injection was vaccinated, the antibody level in the body also rebounded significantly in the face of Omilon. And at present, some of the research results point to the fact that if the reinforcement needle is mixed, it can induce a higher neutralizing antibody GMT level.

New source: Tencent News Knowledge Officer @ Hao Haohua

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【Why can the second round of nucleic acid screening in Xi'an screen 127 positives, what does it mean?】 】

In order to effectively prevent and control the epidemic, Xi'an has opened two rounds of nucleic acid screening, of which the second nucleic acid screening has detected a total of 127 positives. While marveling at the high efficiency of nucleic acid screening for all employees in Xi'an, it is inevitable that there are some worries for Xi'an. After two weeks of fermentation, why are there still so many infected people, and even many from outside the containment area. Xi'an, what happened to this thousand-year-old capital?

The epidemic in Xi'an is far more serious than imagined

On December 8, a new locally confirmed case was added to Xi'an City, who was a staff member of a centralized isolation point for inbound personnel. The emergence of this case also kicked off the prelude to the current round of Xi'an epidemic, but the Xi'an outbreak may have occurred earlier than this. Genetic sequencing later revealed that the real culprit of the outbreak in Xi'an was a case on a Pakistani flight. Since December 8, at least two weeks have passed, from the beginning of individual cases to the current dozens of new cases every day, the epidemic in Xi'an may be underestimated. Although the local government resolutely adopted some area closures, it proved to be ineffective. Not only did a large number of cases appear outside the containment area, but also spread to Yan'an and Xianyang in Shaanxi, and even spilled over to Beijing and Zhoukou in Henan. The number of cases found in the second round of nucleic acid screening once again proved that the local area has progressed from hidden transmission to more community transmission, so on December 22, Xi'an issued a "48-hour nucleic acid negative certificate + official letter" departure requirements.

There are still a large number of potentially infected people in society, which makes epidemic prevention more difficult

Judging from the source of the cases reported on December 22, most of the patients came from nucleic acid testing, and only a small part was found as a close connection, which suggests that there are more cases in the social field, and these cases will be associated with more close contacts, which is the risk point of further expansion of the epidemic, and Xi'an is facing huge pressure in the work of circulation and close connection control.

Why is the epidemic in Xi'an so serious?

Judging from the analysis of the available data, the main reason is that the early cases and sources have not been discovered in time, and the transmission route of the epidemic has not been completely blocked. Although it has been quickly discovered that the source of the epidemic is related to the importation of the epidemic, how the imported cases from abroad leads to the local connection, that is, the risk point of the spread of the epidemic has not been found in a timely and effective manner. This has also resulted in a hidden infection in Xi'an, the presence of at least three chains of transmission, and the detection of more cases outside the containment area. The epidemic is like a snowball, constantly fermenting.

What will be the future direction of the epidemic in Xi'an?

At present, Xi'an has adopted containment measures, reduced personnel mobility, and carried out large-scale nucleic acid screening, which are all means to effectively control the epidemic. In the next incubation period, there will be a large number of cases, which have occurred in both Dalian and Manzhouli outbreaks. If Xi'an wants to control the epidemic as soon as possible, it also needs to carry out at least several rounds of nucleic acid screening for all employees, and then further identify risk points and accurately control areas according to the situation of cases, at least about 2 weeks.

New source: Tencent News Knowledge Officer @ Dr. Zhang Yu

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New source: Tencent News Knowledge Officer @ Wang Dazai has always been there

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New knowledge source: Tencent News Knowledge Officer @ Heli Smoke and Rain

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Note: The opinion of the knowledge officer is not recommended for treatment, if you need to obtain an individual disease treatment plan, please go to a regular hospital.