A 6-Week-Old Boy Is Seen in the Office for Routine

A 6-week-old boy is seen in the office for routine follow-up after discharge from the neonatal intensive care unit.  He was born at 31 weeks gestation to a 41-year-old woman via cesarean delivery for preeclampsia with severe features and breech presentation.  The hospital course included brief oxygen supplementation via continuous positive airway pressure and nasal cannula and phototherapy for jaundice.  The patient is now breastfeeding every 3 hours and gaining weight appropriately.  Maternal prenatal laboratory studies were normal.  Weight today is 3 kg (6.6 lb) .  Examination is unremarkable.  The parents inquire about upcoming vaccines for their infant.  Which of the following is the most accurate statement regarding immunization scheduling for this patient?

A) Immunizations are given according to the chronologic age
B) Immunizations are given according to the corrected gestational age
C) Immunizations are given when antibody testing confirms an immune response
D) Immunizations are given when weight ≥4 kg (8.8 lb)
E) Toxoid vaccines are given according to chronologic age, but live attenuated vaccines are given according to corrected gestational age

Correct Answer:

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