Vaccination rate of immigrants in Hong Kong

Is COVID-19 "strong in the north and weak in the south"? The sooner "Yang", the better? Is high fever and sore throat so uncomfortable a very mild disease? Does Omicron infection have sequelae? Will there be repeated infections? How does the school do well in class and prevention and control? Will there be a high mortality rate in the Mainland similar to that in Hong Kong in the first half of this year? Why do you want to get a xenovaccine?

On the afternoon of February 15, at 65438, Zhong Nanshan, an academician of China Academy of Engineering, shared the theme of "COVID-19 Epidemic Situation and Response" in the "National University Epidemic Prevention Lecture Hall", telling his current views and future judgments on the epidemic situation:

1, the epidemic strains in Guangzhou and Chongqing are BA.5.2, and the epidemic strains in Beijing and Baoding are BA.5.2. 1.7, which are mutant strains based on ba.5.2. Generally speaking, there is no obvious difference between them. Symptoms such as high fever and physical pain may be related to temperature or immune escape of virus strains.

The pictures in this article are all screenshots of Academician Zhong Nanshan's speech at the "National University Epidemic Prevention Lecture Hall".

2. From a medical point of view, as long as the virus does not invade the lungs and does not produce hypoxia, it is not serious, but mild. Some people have symptoms such as dry throat, sore throat, dry cough, headache and fever. , belonging to mild patients. Such physical discomfort is different from "serious" in medicine.

3. Compared with Delta strain, the risk of COVID-19 sequela caused by Omicron strain is lower. It was found that about 10.8% of Delta infection cases had long-term sequelae, while only 4.5% of Omicron infection cases had sequelae. Compared with Delta epidemic period, during the epidemic period of Omicron virus strain, the probability of common symptoms of infected people decreased, but the proportion of sore throat increased.

Voice sharing screenshot

4. It is found that asymptomatic infected people basically have no sequelae of COVID-19, and the risk of sequelae of patients vaccinated before infection is low, such as the risk of olfactory disorder is reduced by 42%, the risk of taste disorder is reduced by 39%, the risk of hearing disorder is reduced by 40%, and the risk of anxiety or depression is reduced by 29%.

Voice sharing screenshot

5. A study found that after people are infected with Omicron, there is a 76.2% chance that there will be no symptoms of reinfection within one year, and the protection rate of infection can reach 78%. Another study showed that the protection rate of secondary infection of Omicron BA.5 was 92.7%, and it was not easy to be reinfected within one year. Therefore, a shot of Omicron, even if there are symptoms or no symptoms, is actually equivalent to a shot of vaccine, which has gained better immunity to resist the risk of secondary infection.

6, COVID-19 Omicron infection is not terrible. After continuous mutation, the death rate of Omicron in COVID-19 decreased to 0.65438 0%, and the infection site was mainly in the upper respiratory tract. From the Chinese name, Omicron infection is no longer suitable to be called COVID-19, but should be called COVID-19 upper respiratory tract infection or COVID-19 cold.

7. With the variation of COVID-19, the policy should be adjusted accordingly, and the focus should be shifted from prevention and control of infection to prevention and control of severe cases, but this does not mean that we can "lie flat" or continue to prevent infection. China has a large population base, so we should pay attention to prevent large-scale infection in a short period of time, which will affect the normal social order or lead to the emergence of new mutant strains.

8. The later the "yang change", the milder the symptoms may be. COVID-19 virus infection is a natural law. People will not take the initiative to get sick, but because Omicron is highly contagious, the probability of infection is very high. However, the longer the infection is delayed, it is estimated that the chances of uncomfortable symptoms after infection are less and less. Eventually, more and more infected people will be asymptomatic.

9, the school is the focus of epidemic prevention and control, to maximize the protection of the health of teachers and students, but also to maintain the normal teaching order. Schools without epidemics should carry out normal offline teaching activities. The so-called epidemic-free does not mean that there is no infection at all. It can isolate sporadic cases, scientifically and accurately define risk areas, and ensure normal teaching and living order outside the risk areas.

10. It is speculated that if the mainland releases the epidemic control, it will experience the peak of the epidemic in Hong Kong at the beginning of this year. According to the population size of the mainland, 200 million people may be infected and may die100-200 million people. This inference is not necessarily appropriate. At that time, the vaccination rate in Hong Kong was much lower than that in the Mainland. According to the current vaccination rate in the Mainland, this will not happen.

Voice sharing screenshot

1 1. One of the keys to prevention and control in the next step is to strengthen vaccination. It is strongly urged to speed up the intensive vaccination, especially when the Spring Festival is coming. Vaccination usually takes half a month to take effect, which is of great benefit to the prevention and control of the epidemic in Spring Festival travel rush. If we continue to strengthen immunization with the same vaccine, the effect of preventing infection will not be enhanced, but the effect of preventing severe diseases still exists. The immune effect of heterogeneous vaccine is obviously improved. It is necessary to strengthen the immunization of the elderly and vulnerable groups, strengthen the vaccine protection of medical personnel, and speed up the research and approval of nasal spray and inhalation vaccines.

Voice sharing screenshot