probably not but an extra vaccine won't really hurt him. he can always get a blood test to see if he has an hep b antibodies present. if he does he does not need another one.
my son's 3rd hep b vaccine was administered 2 weeks too early. does he need a 4th one? he's 8 had these when 1-2 yrs. he received his vaccines on 12/10/204 2/10/2005 and 3/29/2005. 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.