The third dose of the new crown vaccine usually refers to the new crown vaccine booster vaccination, which can be carried out through the unit or community organization, or by appointment at the vaccination point. People aged 18 years and above who have completed the full course of inactivated New Crown vaccination and the last dose has been given 6 months ago can receive the New Crown booster vaccination. At present, China’s new crown vaccine booster vaccination is first carried out for the key population with high risk of infection, and other general population with vaccination needs can be vaccinated free of charge through the organization of the unit or community, and by appointment at the vaccination site. Priority for vaccination of key populations in accordance with the local epidemic command department unified arrangement, unit organization and orderly vaccination. Vaccination points for booster immunization of the new crown vaccine in each region can be inquired through the websites of the local epidemic command departments.