There are many types of congenital heart disease, such as small ventricular septal defects, atrial septal defects, and patent ductus arteriosus. None of these congenital heart diseases are early enough to show changes in heart function, so vaccination will not have a serious impact on the baby. Precisely because these babies have heart defects, they are more likely to contract the disease than healthy babies, and once infected, the infection is more difficult to cure, so vaccination is even more important. Only those children with cyanotic congenital heart disease, or those who have developed heart dysfunction, should not be vaccinated. As for which type your baby belongs to, please consult the doctor in charge of the clinic and he or she will give you a satisfactory answer.