Booster shots for inactivated vaccines can be given with the same type of vaccine or other types of vaccines, while adenovirus carrier vaccines must be given with a booster shot of the same type of vaccine. The current booster vaccination is mainly inactivated New Coronavirus (NCV) vaccine booster. You can choose a booster shot of the same type of vaccine, i.e. inactivated NCV vaccine booster, which is able to target and strengthen the number and titer of antibodies in the body, thus improving the protective effect. Other types of vaccines can also be chosen as booster shots, such as adenovirus vector vaccine or mRNA vaccine, which are in line with the current recommendations for sequential vaccination and can provide more comprehensive protection. Depending on the availability of vaccines in your area, you can choose a vaccine that is convenient for you to receive. If adenovirus-vectored vaccine is given, a booster dose of the same type of vaccine is also required.