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December 15th

National College Anti-epidemic Lecture Hall was held in Sun Yat-sen University

Academician Zhong Nanshan, an academician of the Chinese Academy of Engineering, lectured:

New crown (Omicron) epidemic dynamics and response

Which areas or furniture in the home are the key points of disinfection? [Popular Science] If you have a

01 Omicron pathogenicity is greatly weakened

mortality rate is close to influenza

"Currently, the second wave of Omicron epidemic has been encountered nationwide, characterized by strong transmission." Zhong Nanshan believes that Omicron is constantly mutating, and its transmission is getting stronger and stronger, but its pathogenicity is greatly weakened. In the early stages, the infection sites were the upper respiratory tract, airway and lungs, but after two years of mutation, Omickron was mainly concentrated in the upper respiratory tract.

From the national trend, after Omickron's infection, the proportion of asymptomatic infections in increased significantly. In this regard, Zhong Nanshan said that he analyzed the epidemic situation in Guangzhou, Beijing, Chongqing, Zhengzhou and other cities in China since September this year, and believed that the mortality rate of the new crown epidemic is close to that of the flu.

02 The new coronavirus is "strong in the north and weak in the south"?

There is no significant difference between the two strains

In the lecture hall, Zhong Nanshan said that the popular strain in Guangzhou is BA.5.2; the popular strain in northern China 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.

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, i.e. asymptomatic infections. Some people have symptoms such as dry throat, sore throat, dry cough, headache, and fever, which are 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, and it does not mean that severe pain is a serious illness.

03 After infection with Omickron once, the proportion of reinfection within one year is very small

Zhong Nanshan said that infection with Omickron (BA.4/5, BF.7) is not scary, and most of them can fully recover within 7-10 days. He also pointed out that many data currently show that after infection with Omickron once, the proportion of reinfection within a year is very small. He said that after is infected with Omickron once, antibodies will be produced in the body, which is equivalent to getting the vaccine once.

04 Asymptomatic infections basically have no sequelae of the new crown

Talking about the sequelae issue, Zhong Nanshan said that since the outbreak has only been three years since the outbreak, there is still a lot of debate about sequelae. Some clinical manifestations such as olfactory and taste disorders, joint/muscle pain, sleep disorders, fatigue/fatigue, etc., are gradually relieved in many cases, which may not be "sequelae". Studies show that the proportion of "sewers" caused by is lower than that of delta , and asymptomatic infections basically have no sequelae of the new crown. patients who have been vaccinated before infection have a decreased risk of sequelae.

05 The later the "become a yang'" symptoms may be milder

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 he will be infected. However, the later the infection delays, the less likely you will have to experience hard-working symptoms after infection, and this will be the case 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."

06 The concept of being positive is not advisable

Zhong Nanshan said that infection of Omickron (BA.4/5, BF.7) is not scary, and most of them can fully recover within 7-10 days.

Zhong Nanshan mentioned that there is a saying now that "early is yang and late is yang, it is better to be yang together." This concept is not advisable. Preventing infection is still important. China has a large population base. Be careful to prevent large-scale infections in the short term, which will affect normal social order and lead to the emergence of new mutant strains.

He pointed out that on the one hand, there is a strong call for accelerated vaccination, especially the strengthening of xenotype vaccines. On the other hand, personal protection is also very important. Wear a mask, wash your hands frequently, ventilate frequently, and abide by one-meter line. In addition, we must strengthen the promotion of drugs and the third phase clinical trials, promote the approval process, and accelerate the launch of the market.

Zhong Nanshan

put forward 8 personal protection suggestions

▽

◆ Strengthen protection (wear masks, keep distance, reduce public gatherings, etc.);

◆ Don’t be afraid of infection;

◆ Most infected people do not need to go to the hospital;

◆ Pay attention to frequent antigen testing at home;

◆ If you continue to have fever, you must go to the hospital;

◆ Elderly people with general chronic diseases should also be vaccinated;

◆ There is no need to hoard medicine;

◆ "New use of old medicines" must undergo strict experiments.

Source: People's Daily, CCTV News

Editor: Chen Jia

Editor: Chen Guangtai

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