A seven-month interval between the third booster dose of the new crown vaccine does not affect the vaccination effect, and timely vaccination is recommended if there are no relevant contraindications to vaccination. The third dose of the new crown vaccine needs to be given more than 6 months after the second vaccination, and the appropriate delay will not affect the vaccination effect. The third dose of the new crown vaccine has the function of strengthening immunity, and the third booster shot can only be given six months after the full vaccination, so the interval of seven months can also be vaccinated normally. Vaccination is contraindicated in case of severe allergy to the vaccine, acute diseases or severe exacerbation of chronic diseases. Clinical studies have shown that the new crown vaccine has good safety and efficacy, in order to prevent the spread of the epidemic, it is recommended that the vaccine be administered in a timely manner, and if there are special circumstances, it can be appropriately delayed vaccination.