Omicron epidemic prevention and control slogan

"After being infected with COVID-19 virus, there are still a few people who may be infected with Omicron variant again." 12 16 Zhang Boli, an academician of China Academy of Engineering, told reporters that through the observation of the Omicron epidemic at home and abroad, it can be concluded that COVID-19 is still mutating and has a strong immune escape ability.

In the past few days, the peak of infection in the north is coming, and many people have been infected with COVID-19 virus and recovered. Because Omicron shows stronger spreading ability than previous pathogenic pathogens, everyone is likely to fight it. Academician Zhang Boli gave a reminder on how to make full preparations from a scientific point of view.

Caption: Academician Zhang Boli. Source: people's vision

Beware of multiple subtypes of Omicron.

"There are many subtypes of Omicron strains that are currently popular. "Zhang Boli told reporters that it is difficult for the human body to establish a comprehensive immune barrier against different subtypes of Omicron.

Data from many countries confirm this. Earlier, some media reported that new subtypes of Omicron appeared in many countries. In addition to BA.5.2 and BF.7, which are widely spread in China at present, the mainstream subtypes in other countries are BQ. 1, BQ. 1. 1, BXX, etc.

Cao Yunlong, an associate researcher in Peking University, said in an academic report that the prevalence of BQ. 1. 1 and XBB increased the local reinfection rate from 20% to 35%. Cao Yunlong was selected as one of the top ten people in Nature magazine to predict the variation trend of COVID-19.

Although many people think that people infected with COVID-19 will produce corresponding antibodies, Academician Zhang Boli reminded that the variation of the virus will reduce the specificity of neutralizing antibodies produced by different subtypes of infection, and the ability of antibodies to intercept new variant subtypes will also be reduced.

"After being infected with COVID-19 virus, a few people may be infected with variant subtype virus again. "Zhang Boli reminded that, therefore, for the recovered people in COVID-19, the best way during the epidemic period is still to implement protective measures, including wearing masks, paying attention to hand hygiene and keeping social distance, so as to effectively reduce the risk of reinfection.

There are still symptoms after turning negative, what should I do?

In the past week, the number of infected people in COVID-19 has increased significantly. According to the current clinical experience, the course of most infected people is about 7 days. If there are fever symptoms, most people will recover after 3 days. People who have been vaccinated with COVID-19 vaccine and completed intensive immunization have a shorter course of disease and a lighter condition.

However, after the nucleic acid or antigen test turns negative, some patients still have symptoms such as cough, sore throat, fatigue or loss of appetite. What should I do?

"We found that some COVID-19-infected people still have some symptoms after rehabilitation in Wuhan's anti-epidemic stage, but with the weakening of virus virulence, the probability that Omicron-infected people still have symptoms after their nucleic acid turns negative is lower, and the symptoms are lighter and easier to recover." Zhang Boli told reporters that the experience of diagnosis and treatment in the past three years shows that the use of traditional Chinese medicine, acupuncture, massage and traditional exercise can promote the recovery of patients and improve symptoms such as fatigue and shortness of breath. Taking active intervention measures can promote the physical and mental recovery of the cured person to a better state.

For the recovered patients who still have mild symptoms, Zhang Boli suggested that after the nucleic acid turns negative for 2 days, the body temperature should be kept normal, and the rest symptoms should be obviously relieved before returning to work and study. Elderly patients with basic diseases can rest for a few more days. If you are really uncomfortable, you can also choose some targeted Chinese patent medicines.

For those infected people who have no obvious symptoms and have just recovered, Zhang Boli also reminded that Chinese medicine stresses "prevention of disease", that is to say, when the disease has just been cured, the vital qi in the body is still weak and the body function has not fully recovered. At this time, we should also pay attention to the conditioning after illness, on the one hand, consolidate the curative effect, on the other hand, prevent the recurrence of the disease.

What happened to Fuyang? Is it contagious?

It should be noted that recurrence and reinfection are two different concepts. The former is that the infected person has two positive results in the same infection cycle, and the latter is that the infected person has experienced different infection cycles.

For the reason of recurrence, Zhang Boli gave two possible explanations: one reason may be that the antigen test gave a false negative result; Another reason may be that the virus fragments brought by sputum embolism are positive.

"Antigen detection is fast and easy to operate, but in general, antigens can only be detected when the virus replicates to a high level and the amount of detoxification of infected people is high." Zhang Boli explained that due to the low viral load in the late stage of infection, false negative results may appear in antigen detection, so it is generally recommended to self-test antigens for two consecutive days, or take nucleic acid detection as the judgment standard.

"In addition to excluding misdiagnosis and false positives, there is another possible reason related to the patient's sticky sputum." Zhang Boli told reporters that due to the sticky sputum thrombus, the sputum thrombus was wrapped by the virus, and the recovered person brought the virus out when discharging the sputum thrombus in the subsequent lung repair process. At this time, the virus nucleic acid fragment is positive, so it is impossible to culture live virus.

Zhang Boli stressed that no matter what causes the recurrence, clinical observation confirmed that it did not infect others again.

Extended reading:

Zhang Boli: Winter is here, and spring is not far away.

The adjustment trend of COVID-19's return to Class B management is obvious.

From June 5, 2020 to1October 5, 2020, based on the understanding of the etiology, epidemiology and clinical characteristics of COVID-19 at that time, with the approval of the State Council, the National Health and Wellness Commission issued an announcement to include the new coronary pneumonia in the management of Class B legal infectious diseases and take preventive and control measures against Class A infectious diseases.

"Now, it seems that the decision at that time was still wise and decisive, which prevented hundreds of millions of people from being infected, saved hundreds of thousands of lives, won time for vaccine and drug research and development, accumulated treatment experience, and achieved initial results for COVID-19 epidemic prevention and control. This laid a solid foundation. " On February 7th, Zhang Boli told the Science and Technology Daily reporter.

Zhang Boli said that after nearly three years of global epidemic, with the constant variation of the virus, its pathogenicity gradually weakened. 165438+1The Delta released at the press conference of the State Council Joint Prevention and Control Mechanism held on October 29th showed that Omicron mutant and its evolutionary branches BA. 1, BA.2 and BA.5 series, including BF.7, BQ. 1 and recombinant XBB, were pathogenic and toxic. For example, in this epidemic, Guangzhou reported more than 654.38+600,000 local infected people in COVID-19, and asymptomatic infected people accounted for about 90% of the total infected people, with only 4 severe and critical cases and no deaths.

"From the characteristics of viruses and diseases, the necessary conditions for continuing to implement A-level management have obviously declined gradually." Zhang Boli said.

The "Ten Articles of New China" issued by the the State Council Joint Prevention and Control Mechanism Comprehensive Group on the 7 th proposed that it is necessary to scientifically and accurately divide the risk areas and not to adopt various forms of temporary closure and control; Further narrow the scope of nucleic acid detection and reduce the frequency; Asymptomatic infected persons and mild cases with home isolation conditions generally adopt home isolation ... This is adjusted according to the concept of Class B or Class C infectious disease management, which will have some conflicts with COVID-19's Class A management regulations.

"Will COVID-19 continue to reconsider according to the management needs of Class A infectious diseases, and how to adjust it is more in line with the requirements of coordinating epidemic prevention and control and economic and social development?" Zhang Boli believes that, on the whole, the conditions for COVID-19 to return to Class B management are becoming more and more mature.

COVID-19's return to B-level management requires steady progress, taking small steps.

Since the beginning of 2020, strict measures for the prevention and control of infectious diseases have been implemented, and the country is gradually adjusting. Zhang Boli believes that the current prevention and control measures are also reflecting the characteristics of Class B management.

According to reports, the main basis for infectious disease management comes from the infectivity and pathogenicity of infectious diseases. Infectious diseases with strong infectivity, strong pathogenicity and high mortality are generally classified as Class A or Class B, and the control measures are generally compulsory isolation and blockade of epidemic areas. Infectious diseases with strong pathogenicity and high mortality, but limited transmission ability, which cause certain harm to society, are classified as Class B; Infectious diseases with strong infectivity, weak pathogenicity and low mortality are generally classified as Class C. ..

After nearly three years of anti-epidemic, China's medical and health care and disease control system has withstood the test, with effective diagnosis and treatment technologies and drugs. The complete vaccination rate of the whole population has exceeded 90%, people's health awareness and literacy have been significantly improved, and the pathogenicity of Omicrovirus is weakening, creating conditions for further optimization and improvement of prevention and control measures.

"Returning the new type of coronary pneumonia to Class B management can release a lot of medical resources from the shelter hospital and restore normal diagnosis and treatment; When rescuing patients in COVID-19, we can pay attention to key people; It can also provide a certain legal basis for further optimizing prevention and control measures in the future, so that there are laws to follow. " Zhang Boli said.

However, Zhang Boli also stressed that the measures to downgrade and control the new type of coronary pneumonia are a major adjustment in epidemic prevention and control, which will have a great impact on people's lives, economy and society. We must persist in striving for progress while maintaining stability, and take small steps without stopping. It is believed that the leading department will make a comprehensive judgment according to the virus variation and epidemic changes, so as to make timely and orderly adjustments.

"Winter is here, and spring is not far away, not to mention the early spring of next year." Zhang Boli said.

Source: Science and Technology Daily