The first two doses of the vaccine were given with Beijing Coxing vaccine, and the third dose was given more than 8 months after the second dose, so it is possible to give the third booster. Currently, for the inactivated vaccine, the interval between the first and second shots is at least 3 weeks. The interval between the second and third booster shots is at least half a year, and the interval has been 8 months, as long as the body does not show symptoms of discomfort, it is possible to inject the third vaccination. In addition, the first and second injections were given with Beijing Kexing’s vaccine, and the third injection can also be given with Beijing Kexing’s vaccine. After the implementation of the sequential booster immunization strategy, those who have completed the full course of inactivated vaccination can also choose the recombinant protein vaccine of Zhi Fei Long Coma or the adenovirus vector vaccine of Kang Xinuo for sequential booster immunization. It is important to note that one of the most effective ways to prevent novel coronaviruses is still vaccination. In addition, active wearing of masks and keeping the living environment ventilated and free from congregation can also prevent the spread of the virus. If symptoms such as fever and cough occur, consult a doctor for diagnosis.