Booster injection refers to the third dose of the new crown vaccine. Simple pulmonary nodules without other symptoms can be injected with the third dose of the new crown vaccine, but it is not recommended to receive the vaccine if the inflammation is in an acute exacerbation period, and it is recommended to consult the doctor’s advice at the vaccination center before receiving the vaccine if you have pulmonary nodules or other underlying diseases. If the lung nodules are caused by chronic inflammation, the localized nodules usually do not cause symptoms such as chest pain, cough and chest tightness, and the condition is stable and there are no other symptoms, it is possible to administer the third dose of New Crown Vaccine. However, if the disease is in the acute phase of inflammation and is accompanied by symptoms such as cough, chest pain, dyspnea, fever, etc., it is not possible to administer the third dose of the new coronary vaccine during this period; in addition, if there are signs of malignant degeneration of the lung nodules, which may lead to symptoms of discomfort, it is not recommended to administer the third dose of the new coronary vaccine either. If you have lung nodules or other underlying diseases, it is recommended that you consult a doctor at a vaccination center before receiving the vaccine, so that the doctor can advise you on the correct regimen and decide whether or not to receive the vaccine according to the doctor’s instructions.