The vaccination time for the booster shot of the new crown vaccine is to complete the first two vaccinations and the interval between vaccinations should be more than six months, the specific local vaccination schedule should be consulted with the immunization department. For the booster vaccination of the new crown vaccine, it is required to complete the first two inactivated vaccinations and the interval between vaccinations should reach 6 months. If the vaccination is given after 6 months, the titer and quantity of antibodies in the body will gradually decrease, which may affect the effect of booster vaccination. Consult with your local health and epidemic prevention department for the specific schedule of vaccination in your area. Due to factors such as vaccine production capacity, epidemic prevention and control, it is not possible to standardize the schedule across the country. Consult the CDC for specific timing and follow the guidelines for vaccination.