What's the difference between single and double COVID-19 vaccine

How to choose COVID-19 vaccine for single shot and double shot

The choice of COVID-19 vaccine for single shot and COVID-19 vaccine for double shot mainly depends on the individual vaccinators. However, in terms of efficiency and vaccine stability, the double shot novel coronavirus vaccine is more recommended, especially the inactivated vaccine developed by Jingkexing Zhongwei. After two shots of vaccine are inoculated in the regular time, the vaccine efficiency can be as high as 91.25%.

What is the difference between single shot vaccine and double shot vaccine

At present, China has five new novel coronavirus vaccines on the market, which can be mainly divided into inactivated vaccine, adenovirus vector vaccine and recombinant protein vaccine. They are developed by different companies and have different efficiencies, with varying protective effects on the human body. In addition, the number of doses required for different vaccines also varies.

On the market, the novel coronavirus vaccine that only needs one shot is an adenovirus vector vaccine. It is a live vector vaccine made by introducing the novel coronavirus antigen gene and using a bioreactor. It can induce antibody production and enhance cell immunity, but its effectiveness is low.

Double dose vaccines are mostly inactivated vaccines, which are vaccines prepared by culturing and amplifying live viruses, using physical and chemical methods to kill them, and then purifying them. Inactivated vaccines have a strong immune response, good safety, and high efficacy.