What is a booster shot of new crown vaccine in henan province henan new crown vaccination shot

What is the meaning of the new crown vaccine booster shot in Henan Province?

The so-called vaccine booster shot is an additional vaccination after the routine use of vaccine dosage and dose injection. Booster shots increase the preventive effect of the vaccine.

Why do I need a booster shot?

Recently, our vaccine research and development task force organized experts to conduct a special study on whether to carry out booster vaccination, and combined with the results of the study on booster vaccines by Sinopharm Zhongsheng and Beijing Kexing, it was found that the vaccines of both of them showed varying degrees of decline in antibody after 6 months of vaccination. In fact, this was the pattern for all conventional vaccines. But after the decline, at 6 months time, they administered a third dose and first found that the vaccination was very safe, with similar safety data to their first and second doses.

Secondly, after the third dose of inoculation, there was a rapid rise in the level of antibodies in the recipients, which began to appear after 3 days and rose to a higher level after 7 days, and by the time they were 14 days old, it was probably equivalent to anywhere from 15-30 times the original level. However, in this group of people who were vaccinated 6 months later, and then tested again at 6 months, the antibodies still showed a decline, but the low point to which they fell also exceeded the peak of the 2-dose vaccination. From an immunogenicity standpoint, we feel that booster vaccinations can enhance the protective effect of the vaccine.