 [ Symptoms ] my son is 3rd hep b vaccine was administered 2 weeks too early does he need a 4th one he is 8 had these when 1 2 yrs he received his vaccines on 1210204 2102005 and 3292005 school nurse recommends a 4th one but i am dubious and wanted a second opinion other than my pediatrician who made the error in the first place thanks [ Disease ] a newborn has no teeth so do not worry about cleaning their gums mom is natural breast milk will protect them from infections