In the case of the current prevention and control of the new coronavirus pneumonia vaccine, the booster shot is the third shot for the two-dose vaccine, but not for the three-dose vaccine. The purpose of the booster shot is to strengthen the weakening antibody capacity in the human body, when the vaccination is completed to obtain the immunization program, with the passage of time the antibody activity in the human body will be weakened, the virus immunity is weakened, and at this time, the booster shot is needed to consolidate the immune capacity of the human body. The third vaccination is part of the complete immunization program, and it is necessary to receive the third vaccination in order to have a relatively complete immune effect. The inactivated New Crown Pneumonia Virus (NCPV) vaccine is a two-dose vaccine, while the recombinant subunit vaccine is a three-dose vaccine. Patients should not take the vaccine lightly, and should do a good job of self-protection, and should seek medical attention immediately after the onset of symptoms such as fever, cough, and sore throat. [Tip] In this article, “new coronary pneumonia, new coronary virus pneumonia” has been renamed to “new coronary virus infection” on December 26, 2022, as announced by the National Health Commission.