Promoting vaccination in COVID-19 to protect public health and safety.

　The vaccination work in COVID-19 has made gratifying progress. Up to now, the cumulative number of people who have completed the whole vaccination in China has exceeded 1.1 billion, ranking first in the world. Since the beginning of this year, China has promoted vaccination in COVID-19 on a large scale, which has effectively curbed the spread of the epidemic in some areas and contributed to the prevention and control of the epidemic.

　　At present, the global COVID-19 epidemic continues to spread and the virus is constantly mutating. China’s normalized epidemic prevention and control measures are effective, and the risk of domestic infection is low, but it still faces a greater risk of epidemic import, as evidenced by the recent outbreak. The most scientific, economical and effective way to prevent and control the epidemic is vaccination.

　　The safety of COVID-19 vaccine in China is guaranteed. At present, four vaccines in China have been approved for conditional marketing by National Medical Products Administration, and three vaccines have been approved for emergency use. Among them, two inactivated vaccines have been included in the list of emergency use by the World Health Organization, and many vaccines are submitting relevant materials to WHO, making good progress. China’s vaccines have been inoculated in more than 1 billion doses in countries with high epidemic situation abroad and over 2.5 billion doses in China. In the process of vaccination, the safety of the vaccine is good and the side effects are low. The data show that the proportion of fever after vaccination in China is about 17.61/1 million, which generally does not need to be treated; The severe allergic reaction is less than one in ten million, as long as it is handled in time, it will be fine. Judging from such a low adverse reaction rate, the safety index of COVID-19 vaccine is better than other vaccines vaccinated in normal years.

　　Vaccination with COVID-19 vaccine is the fundamental strategy to reduce infection, severe illness and death. In the recent sporadic epidemic, a small number of people who have completed vaccination are infected with the virus. In fact, it is impossible for any vaccine to achieve 100% protection. In the case that the immune barrier is not fully established, as long as the virus spreads strongly, some vaccinated people will also be infected. However, it must be noted that more people have acquired antibodies through vaccination and resisted the attack of the virus. In fact, in addition to preventing infection, the vaccine can also protect infected people and prevent the disease from getting worse. Based on the research in countries with large-scale epidemic abroad, COVID-19 vaccine in China has a certain effect on preventing infection, a clear effect on preventing re-transmission, and a significant effect on preventing severe illness and death.

　　COVID-19 vaccine in China is still effective against mutant strains. At present, the mutant strains have not caused subversive changes in the biological characteristics of Covid-19, and the existing vaccines in China still have good preventive and protective effects. Recently, the sporadic epidemic situation in China was all caused by the importation of mutant strains, which even spread potentially for some time in some places. Because residents were vaccinated on a large scale, there was no large-scale infection. Vaccine is more effective in reducing severe illness and death. This summer, among the severe patients infected with Delta mutant in Jiangsu and other places, only about 5% of all severe cases were infected with two doses of vaccine. In July this year, a study conducted by Zhong Nanshan, an academician of China Academy of Engineering and a professor of respiratory medicine in the First Affiliated Hospital of Guangzhou Medical University, showed that the protective effect of inactivated vaccine in China on severe diseases reached 100%. In the future, the virus may constantly mutate. If there is a mutant strain that the existing vaccine can’t cope with, China can also develop and produce new vaccines in time.

　　The best way to prevent COVID-19 is to vaccinate. As long as physical conditions permit, people who have not been vaccinated should be vaccinated as soon as possible. This is not only the need to protect themselves and their families’ health, but also the need to protect social public health and safety. Of course, vaccination does not mean that we can relax our vigilance, because the protective effect of the vaccine is not 100%, and it takes some time to produce antibodies in the body. Therefore, after vaccination, personal protection should still be done.