One: China COVID-19 vaccine The first batch of COVID-19 vaccine in China belongs to the whole virus inactivated vaccine. After vaccination with COVID-19 vaccine, neutralizing antibodies will be produced in the body, but only antibodies may not play a protective role. The influencing factors include the concentration of antibodies produced in the body and the difference of personal constitution. The protective effect of 79.34% means that 79.34% of the vaccinators can finally produce effective protection, which is far higher than the standard of not less than 50% proposed by the World Health Organization. At first, COVID-19 vaccination targeted at some key people in China, including cold chain logistics personnel, customs border inspectors, medical disease control personnel, fresh market employees and public transport workers.
Two: Whole virus inactivated vaccine The principle of this vaccine is to inactivate and purify COVID-19 cultured in vitro. Inactivated virus has no pathogenic ability, but it can still stimulate the body to produce immune response after entering the body, thus producing antibodies to neutralize the virus in the body. The advantages of developing inactivated virus in China are mature research and development platform, stable production technology, controllable quality standards, good protection effect, fast research and development, easy large-scale production, and internationally accepted safety and effectiveness evaluation standards. Many foreign countries have found mutant COVID-19, and mutant COVID-19 is more contagious. Related research shows that COVID-19 inactivated vaccine can neutralize many kinds of mutant strains of 10 from South Africa, Britain and other regions.
Three: The Significance of Vaccination to COVID-19 Since the beginning of 2020, COVID-19 has been sweeping around the world, because COVID-19 is a newly discovered virus, which is highly contagious. Under normal circumstances, there is no antibody against COVID-19 in our body, and there is no effective means to treat COVID-19 in the world, so COVID-19 vaccine has become the most effective way to prevent COVID-19 infection. When enough people in the society are vaccinated with COVID-19 vaccine, a group immune barrier can be established to prevent the occurrence of group infection in COVID-19. Moreover, the more people vaccinated with COVID-19 vaccine, the stronger the group immune barrier. Countries all over the world are promoting people to be vaccinated with COVID-19 vaccine, with the aim of establishing a group immune barrier as soon as possible, so as to gradually restore social and economic activities. Although the COVID-19 epidemic in China has been stably controlled, it still faces severe risks from abroad. Only by establishing a basic group immunity barrier can it become the basic guarantee for China to restore its social economy and normal life.