Whether or not a patient with hyperthyroidism can receive the third dose of the New Crown vaccine depends on whether or not the symptoms of hyperthyroidism are effectively controlled. If the symptoms of hyperthyroidism are under control and there are no other contraindications, the third vaccination is allowed; however, if the hyperthyroidism is extremely poorly controlled, it is not recommended to receive the vaccine at this time. It is recommended to consult the attending physician before vaccination. 1. Hyperthyroidism under control: If the patient is examined by the attending physician and has no serious symptoms of hyperthyroidism (e.g., arrhythmia, impaired consciousness, etc.), and the thyroid function is stable, the third dose of XKV vaccine can be administered, and the patient should be observed closely for any adverse reactions after the vaccination. 2. Poor control of hyperthyroidism: If the hyperthyroidism patient is in the fluctuation period, the symptoms are more serious and difficult to control, or the thyroid function is obviously abnormal, it is not recommended to receive the third injection at this time. Patients with hyperthyroidism should be kept under observation after vaccination. Patients with hyperthyroidism may have symptoms such as diarrhea and fever, which can be easily confused with adverse reactions after vaccination and should be identified. Inform your doctor if you feel unwell to avoid delaying your condition.