The third dose of vaccine generally refers to the third dose of the new inactivated coronavirus vaccine. Beijing KXZV does not have the third dose of the new inactivated coronavirus vaccine. The new inactivated coronavirus vaccine produced by Beijing Coxin C&W is a two-dose vaccine, which needs to be inoculated twice in total, not just one dose. The new inactivated coronavirus vaccine is mainly designed to stimulate the body’s immune response to produce the corresponding antibodies to the new coronavirus, so as to play a preventive role in the prevention of the new coronavirus. Therefore, Beijing Coxin China does not have a third inactivated vaccine for the new coronavirus. Normally, twenty-one days after the first inactivated vaccine, you can make an appointment to receive the second inactivated vaccine at the corresponding hospital, but it is usually recommended not to exceed twenty-eight days. If there are special reasons for not completing the vaccination within the prescribed time, the second dose of the inactivated coronavirus vaccine should be completed as soon as possible in order for the vaccine to have a better immunization effect on the human body.