What vaccines can be vaccinated to strengthen immunity at this stage? How often can I get a "booster shot"?

At present, the vaccines that can be used to implement supplementary immunization in our city include inactivated vaccines from Sinopharm Zhongsheng Beijing Company, Beijing Kexing Company and adenovirus vector vaccines from Tianjin Kangxinuo Company.

Citizens and friends, you can only choose to have a "booster shot" after completing the whole vaccination of COVID-19 vaccine for six months. In principle, they should use the original vaccine for booster immunization.

(1) In principle, people who have been vaccinated with the same inactivated vaccine twice should use the original inactivated vaccine for 1 dose to strengthen immunization;

(2) For people who have completed two doses of inactivated vaccine, in principle, priority should be given to using the same vaccine as the second dose of inactivated vaccine for 1 dose. If the second dose of the same vaccine cannot be provided, you can use the same vaccine as the first dose for 1 dose booster immunization.

(3) People vaccinated with adenovirus vector vaccine should use the original vaccine to strengthen their immunity.