Zhifei Xincuan vaccine, which refers to Anhui Zhifei Xincuan virus vaccine, requires three shots. Anhui Zhifei Xincuan virus vaccine is a recombinant protein vaccine, which is equivalent to integrating the S protein gene of the virus into microorganisms such as E. coli, and then culturing them in large quantities in vitro, when the microorganisms express the S protein of the virus, and then purifying the S protein to make the vaccine. After two injections, 76% can produce neutralizing antibodies, and after three injections, 90% can produce neutralizing antibodies, which means that three injections are necessary to maximize the effectiveness of the vaccine. Currently, there are three types of vaccines on the market in China, including the adenovirus vector vaccine that requires one injection, the inactivated vaccine that requires two injections, and the recombinant protein vaccine that requires three injections. Before receiving the Anhui Zhifei Xinguan vaccine, it is recommended that you wear loose-fitting clothes, truthfully inform the medical staff of your health condition and medication, and wait for half an hour after the vaccine to make sure there are no abnormal reactions before leaving.