For the recombinant neocoronavirus vaccine, which is routinely administered in three doses, there is a four-month interval between the third and the second dose; in the case of the inactivated neocoronavirus vaccine, it is routinely administered in two doses, and the third dose belongs to the booster dose, with a six-month interval between the second and the second dose. The new coronary vaccines currently administered in China mainly include inactivated new coronary virus vaccine (Vero cell), recombinant new coronary virus vaccine (CHO cell), and recombinant new coronary virus vaccine (adenovirus vector type 5). Among them, the recombinant neocoronavirus vaccine requires three doses, with the second dose to be completed as close as possible to eight weeks after the first dose, and the third dose to be completed as close as possible to six months after the first dose. That is, four months between the third and second doses. The New Coronavirus Inactivated Vaccine (Vero Cell) is routinely given in two doses, and the third dose is a booster shot, requiring a six-month interval between the second and third doses. If you need a third dose, check the type of vaccine you have received and give it as needed. After vaccination, you need to observe for 30 minutes and choose to leave if there is no adverse reaction.