In response to the public concern about the resurgence of positive symptoms after infection with the new coronavirus, Professor Jin Dongyan believes that there is no need to worry too much. He pointed out that after natural infection with the new coronavirus, people will acquire

Recently, Hong Kong virology expert Jin Dongyan talked about the latest research on the new coronavirus at an online conference.

In response to the public concern about resurgence after infection with the new coronavirus, Professor Jin Dongyan believes that there is no need to worry too much. He pointed out that after natural infection with the new coronavirus, people will acquire antibodies within a short period of time, improving their immunity to the new coronavirus. However, such a protective effect is not immediate. Although this cannot completely prevent infection, even after relapse, the viral load in the body will be lower than the initial infection, the infectivity will be greatly reduced, and the probability of severe illness or death will also be reduced.

Based on this principle, Professor Jin Dongyan suggested that when vaccinating the new crown vaccine , it is best to use a combination of intramuscular injection, inhalation and nasal spray vaccination.

Among them, the intramuscular injection vaccine has a significant protective effect on the lungs, while the inhaled and nasal spray vaccines can more effectively protect the upper respiratory tract mucosa. Considering that natural infection will activate mucosal immunity and humoral immunity at the same time, a combination of two methods of vaccination can achieve an immune effect similar to that of natural infection. Based on this theory, people who are vaccinated in combination can obtain the best immune effect and get the best protection even after infection.

Professor Jin Dongyan took the Hong Kong epidemic as an example to confirm the results of this study. He mentioned that from February to April this year, there was a major outbreak in Hong Kong, but from then until now, the epidemic in Hong Kong has been in a relatively stable stage. This is because most Hong Kong people have been vaccinated, and the immune protection of natural infections has played a role. Currently, 82.6% of the population in Hong Kong have received three shots of the vaccine, and 92.9% of people have received at least two shots.

In addition, Professor Jin Dongyan also made a prediction on the development of the global epidemic. He pointed out that the global epidemic is coming to an end.

First of all, the trend of new variants of the new coronavirus is to strengthen the transmissibility and immune evasion, but it is accompanied by the weakening of the pathogenicity of the virus . The existing pandemic and have followed this trend, and up to now, the mutation rate of the new coronavirus has become very low, only about 25% of that of HIV.

Secondly, new coronavirus mutant strains including Omicron have shown obvious selectivity in population immunity, which means that Omicron will gradually shift from a global pandemic to a local epidemic, and the scale of transmission will become smaller and smaller.

Professor Jin Dongyan believes that as long as there are no new variants of that are highly immune or that are highly pathogenic, the global COVID-19 epidemic is coming to an end.

Although the global epidemic situation is generally improving, before the epidemic is truly over, individuals still need to take good protection. In addition to wearing masks, vaccination is still the most effective way. Especially for older people and younger children, try to complete three to four shots of inactivated vaccines.