If the first two doses are inactivated neocoronavirus vaccines, the third dose can be vaccinated with adenovirus vector vaccine, but not if it is a recombinant protein vaccine.
If the first two doses of the vaccine are inactivated New Coronavirus vaccine, after the implementation of the sequential booster immunization strategy, the target population who have completed the full course of inactivated vaccine can also choose the recombinant protein vaccine of ZhiFeiLongKeMa or the adenovirus carrier vaccine of KangXiNuo to receive the sequential booster immunization.
However, if the first two doses of recombinant protein vaccine, i.e. Anhui Zhifei vaccine, are administered, the third dose must also be administered with Anhui Zhifei vaccine. Adenovirus carrier vaccine and recombinant protein vaccine are different technical routes, and the recombinant protein vaccine requires that the full vaccination be completed after three doses, so the third dose cannot be administered with other types of vaccines.
Consult your physician for details.