The interval between the second dose and the first dose of the inactivated New Coronavirus vaccine should be 3 weeks and above, and the second dose should be completed as early as possible within 8 weeks after the first dose. Recombinant subunit vaccine requires 3 doses. The interval between the first and second doses, and between the second and third doses is recommended to be 4 weeks and above, with the second dose to be completed as early as possible within 8 weeks after the first dose. Neocoronavirus vaccines are biological agents developed to prevent the new coronavirus infections that are currently prevalent. The number of doses required varies with different types of neocoronavirus vaccines. The inactivated neocoronavirus vaccine usually requires two doses. It is usually recommended that the interval between the first and second doses should be 3 weeks and above, and the second dose should be completed as early as possible within 8 weeks after the first dose. Recombinant subunit vaccines require 3 doses. The interval between the first and second doses, and between the second and third doses is recommended to be 4 weeks and above, and the second dose should be completed as early as possible within 8 weeks after the first dose. After receiving the second dose of inactivated New Coronavirus vaccine, it is necessary to stay on-site for at least 30 minutes according to the vaccination standard and leave only after it is clear that there is no abnormality, in order to facilitate the timely treatment of the inactivated New Coronavirus vaccine if the inactivated New Coronavirus vaccine causes any discomfort. First-time vaccinees need to receive the second dose of the new coronavirus vaccine on time according to the instructions of the vaccination medical personnel, so as not to delay the vaccination time and affect the effect of the vaccine.