What are the differences between the third dose of COVID-19 vaccine and the two doses? Is the protection rate of COVID-19 booster shot higher

There are three and two injections of COVID-19 vaccine

Two and three injections of COVID-19 vaccine.

Two shots of COVID-19 vaccine cannot work, but three shots are needed to work.

The second difference between two and three doses of COVID-19 vaccine: different vaccine types.

Both the inactivated COVID-19 vaccine and the COVID-19 recombinant protein vaccine need two injections. These two vaccines are COVID-19 vaccines.

Three is the difference between two and three doses of COVID-19 vaccine.

The interval between the two doses of COVID-19 inactivated vaccine should be 3-8 weeks. The best interval between two doses of COVID-19 recombinant protein vaccine is 4-8 weeks, and the best time to complete three doses is within 6 months after the first dose.

Difference between two and three injections of COVID-19 vaccine 4: different protection rates.

The protection rate after two doses of inactivated vaccine administered by Zhongsheng Beijing Company was 79%; The specific protective effect of Zhifei recombinant protein COVID-19 vaccine has not yet been announced, but the protection rate of the South African mutant is high.

Difference between two and three injections of COVID-19 vaccine 5: different components.

The main active ingredients of novel coronavirus inactivated vaccine are disodium hydrogen phosphate (12 water), sodium chloride, sodium dihydrogen phosphate (1 water), aluminum hydroxide adjuvant, etc. COVID-19 three shot recombinant protein vaccine uses transgenic technology to produce RBD protein, which can achieve high production, high purity and low cost.

The difference between two and three injections of COVID-19 vaccine 6: the production process is different.

2-dose inactivated vaccine refers to first cultivating a virus or bacteria, and then inactivating it through heating or chemical agents (usually formalin). The entire production process of the 3-dose recombinant protein vaccine involves protein expression and purification without live viruses. The production process is relatively safe and can be produced on a large scale.

Difference between two and three doses of COVID-19 vaccine 7: different production companies.

Two doses of COVID-19 vaccine were administered by Beijing Kexing Zhongwei Biotechnology Co., Ltd. (Beijing), Sinopharm China Biotechnology Co., Ltd. (Kexing Zhongwei), Wuhan Biological Products Research Institute (Wuhan) Co., Ltd. (Wuhan), Wuhan Biological Products Research Institute (Beijing) Co., Ltd. (Beijing), Wuhan Biological Products Research Institute (Kexing Zhongwei), and Wuhan Biological Products Research Institute (Wuhan).

Will the three shot protection rate of COVID-19 vaccine be relatively high

The protection rate of other vaccines is the same. According to the technical roadmap, the new Crown vaccine is currently divided into three types. There are three doses in the recombinant protein vaccine. The inactivated vaccine consists of two doses. However, regardless of which vaccine is used, the effect is the same as the applicable population. Before the drug is launched, it must be reviewed and approved by the drug regulatory authority. The safety and efficacy of this vaccine are supported by certain data and can be used for heart vaccination. There are currently three types of vaccines on the market, with different frequencies of vaccination. If injecting adenovirus vector vaccine, one-time immunization can be used without the need for secondary immunization. But if an inactivated vaccine is chosen, two injections are required. If re injected within 3-8 weeks after the first injection, if recombinant protein vaccine is chosen, three injections are required. The second is within 4 weeks and 8 weeks after the first injection, and the third is within 4 to 6 months after the second injection.

In a word, the protection rate of the three injection COVID-19 vaccine is equivalent to that of other vaccines, which can play a very good defensive role. Each has its own advantages and disadvantages, and can be immunized according to its own needs.