On December 15, a national university anti-epidemic lecture was held at Sun Yat-sen University . Academician Zhong Nanshan, an academician of the Chinese Academy of Engineering, gave a lecture on: new crown (Omicron) epidemic trends and responses.
Zhong Nanshan system analyzed the characteristics of the second wave of Omikerong epidemic in the country, introduced the biological characteristics, pathogenicity, and strengthened personal protection of Omikerong . After infection, the proportion of reinfection within one year is very small
Academician Zhong Nanshan said that many data currently show that after infection with Omickron once, the proportion of reinfection within one year is very small. He said that after infection with Omickron once, antibodies will be produced in the body, and is equivalent to getting the vaccine .
Omickron mortality rate has approached 0.1%
"Currently, the second wave of Omickron epidemic has been encountered nationwide, and its characteristics are strong transmission." Zhong Nanshan said that looking back on the three years of the new crown epidemic, before the emergence of Omickron strain , the cumulative number of people infected with new crown in my country was about 100,000, and the mortality rate (deaths/confirmed people) was 4.65% . After Omickron entered China, as of December 6, 2022, the cumulative number of confirmed cases nationwide was about 250,000, with a cumulative number of infections of nearly 1.7 million, and the mortality rate (deaths/confirmed number) was 0.24%. 0.24% contains early data, and has recently approached 0.1%.
strain does not exist "strong in the north, weak in the south"
Zhong Nanshan said that the popular strain in Guangzhou is BA.5.2; the popular strain in the north BF.7 (abbreviated as BA.5.2.1.7) is a mutant strain based on BA.5.2. Overall, there is no significant difference between the two strains of .
Zhong Nanshan said that in the north, the incubation period has been further shortened, and the patient becomes contagious the day after the infection. Most people do not have obvious symptoms after infection, that is, asymptomatic infected persons . Some people have symptoms such as dry throat, sore throat, dry cough, headache, fever, etc., that is, in mild patients. He pointed out that the high fever temperature and general pain make the patient feel uncomfortable, but this is different from the severe and mild medical symptoms. does not mean that severe pain is a serious illness.
The faster the Omickron mutation, the stronger the infectiousness
Zhong Nanshan said that before Omickron came out, the strains such as beta, gamma, delta had mutated, but there were not many mutations. But judging from the transmission data in 2022, Omickron is obviously much faster than the original strain . At present, the frequency of Omickron mutations is increasing, and the total mutation rate has reached 96.4%. In other words, there are less than 4% of mutations, which is close to saturation. Therefore, the more mutations of Omickron are, the stronger the resistance to vaccines to all aspects of , and the more contagious it is.
"The later the 'become positive', the milder the symptoms may be"
Zhong Nanshan said that in fact, infection with the new coronavirus is a natural law, and people do not take the initiative to get sick, but because Omickron is very spreading, it is highly likely that they will be infected. However, the later the infection time of , the less likely it is to develop hard-working symptoms after infection , which will be like this over time. He said that prevention should be the main focus. "I believe that in the end, more and more infected people will be asymptomatic."
"It is better to be yang in the morning and the evening, it is better to be yang in the morning."
The concept of "it is not advisable to be yang in the morning and the evening, it is not advisable to be yang in the morning."Because large-scale infection in a very short period of time will affect normal social order, and can easily lead to the emergence of in new variants. Zhong Nanshan strongly calls for accelerated vaccination of vaccines (especially xenotype vaccines). At the same time, he also emphasized that personal protection is still important, wearing a mask, washing hands frequently, ventilation frequently, and one-meter line.
Asymptomatic infections basically have no "sewages" of the new crown
Zhong Nanshan said that a large-scale cohort study of Scottish showed that there was no significant correlation between asymptomatic infections and sequelae . The risk of asymptomatic infected people with "sequelae" symptoms is not higher than that of uninfected people.
patients who were vaccinated before infection have decreased the risk of "sewedness", such as a 42% decrease in the risk of olfactory disorders; a 39% decrease in the risk of hearing disorders; and a 40% decrease in the risk of hearing disorders. He said that medically there is a strict definition of sequelae, which refers to the lifelong existence of damage caused by the disease. Some so-called sequelae of COVID-19 are more subjective feelings, such as general fatigue and brain fog, which are mainly caused by mental and psychological influence. We cannot call it sequelae. At present, no cases of new coronary pneumonia causing long-term insufficiency to the organs have been seen.
How do young people deal with the new crown?
Academician Zhong Nanshan said that the severe illness rate of young people after infection is very low. If there is no early warning symptoms after self-health monitoring after infection, they can continue to isolate at home and release more fever clinic and emergency treatment resources to elderly patients who need it more; If there are suspicious early warning symptoms, they still need to visit the nearest . He suggested that those living with the elderly receive vaccinations and enhance injections, and consciously reduce non-essential outings and gatherings.
3 suggested that the Drug Administration accelerate the research and development and approval of nasal spray and inhalation vaccine
Academician Zhong Nanshan said that the epidemic data from Shanghai from March to June showed that the vaccine has a significant protective effect on the elderly. Compared with those who have not been vaccinated, the risk of death in the population of over the age of 60 has been reduced by 98.08%; the risk of death in the population of 80 has been reduced by 95.83%.
with xenova vaccine (adding subunit protein vaccine/adenovirus vaccine/mRNA vaccine on the basis of two doses of inactivated vaccine ) has significantly improved the effect. It is recommended that the Drug Administration accelerate the research and development and approval of nasal spray and inhalation vaccines.
Zhong Nanshan put forward 8 personal protection suggestions
Academician Zhong Nanshan put forward 8 suggestions for strengthening personal protection:
- Strengthen protection (wear masks, keep distance, reduce public gatherings, etc.);
- should not be afraid of infection;
- should not be afraid of infection;
- should not be afraid of infection;
- Most infected people do not need to go to the hospital;
- attention to frequently undergo antigen testing at home;
- If you continue to have fever, you must go to the hospital;
- The elderly with general chronic diseases should also get vaccinated;
- There is no need to stockpile medicine;
- "new use of old medicines" must undergo strict experiments.
Edited by Zhang Lan Comprehensive Xinhua News Agency, CCTV News, People's Daily, China Daily, etc.
pictures | Live screenshot
