Girls, hello everyone! Our pediatrician when the baby was one month ol…

Girls, hello everyone! Our pediatrician when the baby was one month old said that the baby has fluid in his head. We went for an ultrasound, they wrote a conclusion: ventriculomegaly of the lateral lobes of the lungs of mild degree. When it was three months old, we went back to our pediatrician and asked if everything was okay. She answered that such things happen with children. She gave approval for the vaccination, I'm afraid I don't understand anything about this, I don't know what to do. Has anyone had something like this? Who did the vaccination for the child, can you not do it?