People who are not suitable for booster shots include: those who have not yet completed routine vaccination; those who have completed routine vaccination with the new coronary vaccine for less than 6 months; and those who have contraindications to the new coronary vaccine. At present, people aged 18 years (relaxed to 12 years in some areas) and above who have completed two doses of inactivated vaccine or one dose of adenovirus carrier vaccine for 6 months or more, and who do not have any special health conditions, are eligible for booster vaccination. Contraindications to New Crown Vaccine: 1. Those who are allergic to the active ingredients of the vaccine, any of the inactive ingredients, substances used in the production process, or those who have been allergic to the same type of vaccine before; those who have had severe allergic reactions to the vaccine (e.g., acute anaphylactic reaction, angioneurotic edema, respiratory distress, etc.). 2. Those with uncontrolled epilepsy and other serious neurological diseases (e.g. transverse myelitis, Guillain-Barre syndrome, demyelinating diseases, etc.). 3. Those who are experiencing fever, or suffering from acute illness, or acute exacerbation of chronic diseases, or uncontrolled severe chronic diseases. 4. Women during pregnancy. It is recommended to truthfully inform the health status at the New Crown Vaccination Center, and relevant advice will be given after assessment by a medical professional.