"XBB.1.5 was detected for the first time in China", and it started again?

#XBB.1.5 detected for the first time in China#

On the evening of February 17, the above topic words

Suddenly rushed to the number one position in the hot search

　　It is understood that the source of this topic is the national epidemic situation of new coronavirus infection released by the China Centers for Disease Control and Prevention on February 15, 2023.

　　On February 15, the China Centers for Disease Control and Prevention released the "National Novel Coronavirus Infection Epidemic Situation".

According to the report, since December 2022, a total of 14 local cases of mutant strains of local concern have been discovered nationwide. Compared with the situation disclosed by CDC before this, "1 case of XBB.1.5" is a new case of mutant strains in this cycle.

　　A reporter noticed that there was no XBB.1.5 report in the last reporting period (December 1, 2022-January 23, 2023), and it can be determined that this case was detected from the end of January to the first ten days of February.

Not "the first detection in China"

　　In early January this year, Shanghai discovered the XBB.1.5 strain in the monitoring of imported cases abroad.

　　On January 2, Yuan Zhengan, a member of the expert group of the Shanghai Epidemic Prevention and Control Leading Group, said that the Omicron BQ. Indigenous dissemination on the surface.

【Previously reported】

　　Therefore, the more rigorous statement of the topic should be "the first detection of XBB.1.5 local infection in mainland China".

Will it trigger a new wave of infection spikes?

　　On January 25, Li Tong, chief physician of the Respiratory and Infectious Diseases Department of Beijing You'an Hospital, said in an interview with the People's Daily Health client that with the liberalization of my country's entry and exit policies, there may be more BQ.1 infections in the future , XBB strains of local cases, but overall, the possibility of these two strains appearing in the first half of this year is relatively small.

　　On January 18, Gao Fu, an academician of the Chinese Academy of Sciences, mentioned in an interview with China News Weekly that XBB1.5, a branch of XBB in the United States, has become a strain with an increasing prevalence.

XBB.1.5 has obvious immune escape, almost equivalent to a brand new virus.

At the same time, the BQ.1 strain is also circulating in many countries.

　　"Most people in our country were infected in December last year and January this year. The antibodies produced after this infection can protect them for at least three or four months, and most people can protect them for more than half a year. By March and April this year, most people Some people should still be in the immune protection period.” Li Tong once pointed out that the current research on BQ.1 and XBB shows that although their immune escape ability is strong, the BA. Both strains still have a certain protective effect.

　　On January 17, Xu Wenbo, director of the Institute of Viral Diseases of the Chinese Center for Disease Control and Prevention, also stated at the press conference of the State Council's Joint Prevention and Control Mechanism that BQ. The proportion of BQ.1 and XBB transmission will gradually increase, but they will not cause a new round of epidemics alone.

The prevention of BQ.1 and XBB is the same as the prevention of other mutant strains. We must strengthen the monitoring of virus mutation and disease severity, protect high-risk groups, and advocate being the first person responsible for your own health.

What are the symptoms of XBB.1.5 strain infection?

　　Symptoms of XBB.1.5 infection include fever, cough, dyspnea, diarrhea and vomiting.

　　The symptoms of XBB.1.5 strain infection are not much different from other strains, and the symptoms will also vary according to the physique of the infected person and the number of viruses infected.

Most people are mildly or asymptomatically infected, and only a small number of people will be severely ill.

　　After being infected with the XBB.1.5 strain, you should pay more attention to rest, observe the symptoms of the disease, and seek medical treatment in time if you experience chest tightness, shortness of breath, lethargy, and loss of appetite.

　　In an update issued on February 15th

　　CDC also clearly mentioned

　　December 1, 2022 to February 13, 2023

　　A total of 14 local mutant strains of special concern were found

　　Then,

Will it be widespread?

　　Professor Zeng Guang, a well-known expert in public health and epidemiology, said that whether the new variant of the new coronavirus will spread in a large area depends on two points: one is the transmissibility and pathogenicity of the variant, and the other is the population. susceptibility.

In addition, social factors and natural factors will also affect the transmission process of the virus.

　　"At present, more than 1 billion people in China have acquired natural immunity after concentrated onset of illness in a short period of time, which is equivalent to a general vaccination, and this natural infection immunity is obtained on the basis of 3.4 billion doses of vaccines that have been administered nationwide. The susceptible population in our country is less than 10% of the whole population." Professor Zeng Guang told the Health Times reporter, "It can be said that the people of our country have formed such a large-scale immune barrier in a short period of time, which has never happened in other countries. Higher than most countries in the world, the immune barrier is quite strong."

　　"More than a month has passed since the peak of the current infection, and we have not found a mutant strain that can break through the immune barrier. For the newly added mutant strains, we need to continue to observe. Instead of believing in predictions, it is better to do actual combat detection to detect the evolution of the virus early , to serve for the emergency decision on the most suitable vaccination strategy." Zeng Guang said.

In the face of new variants of the new coronavirus,

Who needs attention?

　　At present, two groups of people need to be vaccinated as soon as possible. One is people who have neither been vaccinated nor infected in this concentrated infection wave, especially the elderly and patients with underlying diseases; the other is children. , especially children who have just turned 3 years old and have not been vaccinated, this group of people must step up vaccination.

　　Zeng Guang reminded that due to the long-term existence of the new crown virus, even if the WHO lifts the state of emergency of the new crown epidemic one day in the future, it needs to issue a reminder at the same time, at least as it treats the flu, and regards the new crown as a key infectious disease for global monitoring and guides countries. Establish a routine monitoring system, and explore the establishment of a standardized annual routine vaccination system similar to influenza.

　　Recently, everyone feels that life is returning to normal.

Did the new coronavirus "suddenly disappear"?

　　Dr. Li Tong Zeng said that from the perspective of many places abroad, the new crown epidemic is not so easy to disappear. Often after a wave of epidemics, there will be another small epidemic after two or three months, and in some places it is even every three months. There will be an epidemic every 6 months.

Therefore, our country has just experienced such a large peak of the epidemic, so when the next wave will appear and to what extent, we still don’t know yet, we can only say that we should do a good job in monitoring this aspect, and at the same time, remind These vulnerable people, they need to better protect themselves.

　　After we are infected, the general protection period is 3 months to more than 6 months, so for people with good immunity, they can be protected for more than 6 months; for people with poor immunity, their protection rate may drop after 3 months.

But within 3 to 6 months, we are relatively safe, unless the virus mutates significantly again.

Will the new coronavirus mutate in the future?

Will there be "super mutants"?

　　Dr. Li Tongzeng said that the incidence of infectious diseases depends on one's immunity and the pathogenicity of the virus.

That is to say, of course, and finally, the two interact to see who is stronger.

Our future trend, in fact, we now estimate that if it (new coronavirus) no longer undergoes particularly large mutations, then its pathogenicity rate will decrease, and its impact on the masses will become smaller.

So everyone is also guessing, whether the mutation of this virus has reached its ceiling, then it will not be too obvious if it increases immunity or escape ability. There is such a trend.

So we estimate that it may be relatively stable in the future.

　　Generally speaking, looking at other infectious diseases in history, it should mean that the pathogenicity has decreased over time, but the infectivity has become stronger, because the purpose of the virus itself does not mean that I must defeat it. Human beings, I don't have to kill the host, or make him scarred. In fact, the virus itself only needs to replicate itself to achieve its purpose. As long as it survives and spreads, it will complete its mission.

The new coronavirus shows us that it replicates in the upper respiratory tract, so that it can spread faster and more efficiently, but if it replicates in the upper respiratory tract, our incidence of pneumonia is less.

In addition, from the perspective of human beings' struggle with the virus, if the disease is very serious and the symptoms of pneumonia are severe, then if we take more active protective measures, it will be more difficult for it to survive.

　　China News Service (CNS1952) synthesized from Global Times, Yangcheng Evening News, Shangguan News, City Express, Health Times, etc.