One: COVID-19 Vaccine As of 24: 00 on March 27th, the cumulative vaccination amount of COVID-19 vaccine reported nationwide exceeded 654.38 billion doses. Regarding the protection period of COVID-19 vaccine, the relevant personnel of the National Health Bureau said that the monitoring data of antibody level showed that the effective protection period of COVID-19 vaccine was basically more than 6 months, and some people who had been vaccinated with COVID-19 vaccine in the early stage could still detect a certain level of antibody in their bodies after 9 months of vaccination. Sinopharm has designed booster needles for COVID-19 vaccine. The preliminary experimental results show that strengthening the needle can effectively improve the titer and persistence of neutralizing antibodies, and also effectively improve the anti-mutation ability of vaccines.
Second, the effect of COVID-19 vaccine on mutant. The mutant COVID-19 has been found all over the world. The mutated COVID-19 is more contagious, and it is more prone to group infection in COVID-19. The effect of COVID-19 vaccine on mutant strains has been highly concerned by the society. Relevant researchers said that cross-sectional comprehensive experiments were carried out on the mutant strains found in Britain and South Africa, as well as more than 10 mutant strains found in other regions. The results showed that the neutralizing antibody produced by inactivated vaccine in COVID-19 had a good neutralizing effect on these strains, and the small variation of COVID-19 would not affect the antigenicity of the vaccine. As long as COVID-19 does not produce protective antigen mutation, COVID-19 vaccine will remain effective.
Three. The Significance of Vaccination with COVID-19 Vaccine In early 2020, COVID-19 swept the world rapidly, and it was easy for people to infect each other, because COVID-19 was a newly discovered virus, which was highly contagious, but we generally didn't have corresponding virus antibodies in our bodies. Only by vaccination with COVID-19 vaccine can we produce corresponding virus antibodies in our bodies, thus effectively preventing COVID-19 from spreading among people. When enough people in society are vaccinated, a basic group immune barrier can be established. If more people complete COVID-19 vaccination, the immune barrier of this group will be stronger. Therefore, all countries in the world are actively promoting people to be vaccinated with COVID-19 vaccine, with the aim of establishing a group immune barrier as soon as possible and restoring social and economic development and normal life as soon as possible. The epidemic situation of COVID-19 in China has been stably controlled, but it still faces the severe risk of importing from abroad. Therefore, we should also establish a group immune barrier as soon as possible to ensure that COVID-19 infection will not happen again in China.