It is common practice in the UK to immunise babies with DTP (diphtheria, pertussis, tetanus), Hib (haemophilus influenza type b), meningitis C, and polio at 8 weeks following delivery, regardless of corrected gestational age. However, such recommendations may be inappropriate for premature babies who may be at increased risk of apnoea and bradycardia.^1,2

Twenty seven week gestation twins underwent their first immunisations at 62 days of age (corrected age 36+2 weeks) The following morning (15–16 hours later) both twins went …