Children with ventricular septal defect and atrial septal defect often suffer from pneumonia and bronchitis, which used to be thought to be due to left-to-right shunt and pulmonary congestion, but is actually related to low immune function and immune mediation dysfunction of the child. Some articles suggest that there are indeed abnormalities in the immune function of children with ventricular septal defect and atrial septal defect by blood sampling. Therefore, parents must pay attention to early diagnosis and treatment of such children to avoid exposing their babies to repeated lung infections that affect lung function. If available, parents can come to our cardiac surgery department, and we will provide you with a comprehensive examination and treatment decision. Patients are welcome to contact me directly for consultation.