It is better not to use polio vaccine and polio vaccine on the same day, because after all, the vaccines can be slightly toxic, and if used together, they may cause a greater burden on the young child, especially if the body is not functioning well, such as when the child has a cold and fever, both vaccines should not be given. So it is important to do a comprehensive assessment, and in the case of a very healthy child, splitting the use is better for the child in the body and also minimizes complications.