The third vaccine, commonly known as the booster shot, can be given to people aged 18 years and above who have completed the full course of inactivated vaccination for a period of 6 months. The third dose of KXCV inactivated vaccine, commonly known as booster vaccination, can be administered to people aged 18 and above who have completed two doses of inactivated vaccine and have completed six months or more from the second dose, and who have ruled out any contraindications to vaccination. The vaccination interval between other vaccines and the new coronavirus vaccine should be more than 14 days; however, when rabies vaccine, tetanus vaccine and immunoglobulin need to be vaccinated due to animal injury or trauma, the vaccination interval with the new coronavirus vaccine may not be considered. It is recommended that the inactivated vaccine of KXCV be administered under the guidance of a physician according to one’s own physical condition and vaccination status.