PA:411,T f R NIARDAN IF THE FOURTH PRIMARY DOSE OF DTP IS ADMINSTERED ON OR AFTER THE FOURTH BIRTHDAY. A FIFTH DOSE IS NOT REQUIRED. DT (PEDIATRIC) VACONE IS ACCEPTABLE IF PERTUSSIS VACCINE IS MEDICALLY CONTRAINDICATED. ICCMPLETE PART C FOR PERTUSSIS ONIRAINDCATION Td (ADULT VACCINE (A SERIES OF 3 DOSE