The third injection of the new coronavirus vaccine is generally referred to as the booster injection of the new coronavirus vaccine, and its contraindications for vaccination mainly include the contraindications for general vaccines, and the special contraindications for the new coronavirus vaccine, such as allergy to similar vaccines, certain acute diseases, and so on. 1. Contraindications for general vaccination: (1) People who are allergic to any component of the vaccine are prohibited from receiving the vaccine. Or have been vaccinated with severe allergic reactions, such as respiratory distress, angioneurotic edema. (2) Being in the period of infection or fever. (3) Suffering from serious heart, liver or kidney diseases, which are not under effective control. (4) Uncontrolled neurological diseases: such as epilepsy not effectively controlled and certain serious neurological diseases, such as Guillain-Barre syndrome and demyelinating diseases. (5) Women during pregnancy. 2. Special contraindications for the new coronavirus vaccine: those who are less than 6 months from the time of the second vaccination. If there are redness, swelling, hard lumps and low-grade fever at the vaccination site after vaccination, it is a general reaction and can be relieved on its own without any tension. If urticaria, angioedema, etc. appear, it is necessary to consult a doctor in time. Consult your doctor if you are suitable to receive the third dose of the new coronavirus vaccine.