Can children who haven't received their vaccinations now get them caught up?

Patient's question:

2 years without vaccination

Doctor's answer:

Hello! Vaccines can be booster shots. Based on your description, this should be considered acceptable.
Generally, vaccines cannot be administered prematurely. Delaying the injection is acceptable. Since the child is troubled by neonatal diseases, the mother must take the child to the hospital immediately for treatment to avoid blindly using small ads for medication. Rational medication is necessary. For parents, it is essential to provide the child with enough care and attention and to do everything possible to help the child receive timely treatment for the illness.