Hepatitis B Vaccination Guidelines for Preterm Infants

Administration Timing

For preterm infants born to HBsAg-negative mothers, the Centers for Disease Control and Prevention recommends delaying the first dose of Hepatitis B vaccine until hospital discharge or 1 month of age, as these infants have significantly decreased immunologic response to the vaccine administered before age 1 month 1, 2, 3
The birth dose should not be counted as part of the vaccine series for these infants, and they will need 3 additional doses after the delayed first dose 2

For preterm infants born to HBsAg-positive or unknown mothers, the Centers for Disease Control and Prevention recommends administering both Hepatitis B vaccine and HBIG within 12 hours of birth, regardless of birth weight 2
The final dose of Hepatitis B vaccine must not be administered before 24 weeks (164 days) of age, regardless of when the series was started 1, 2, 3

Proper documentation of maternal HBsAg status is crucial and should be placed in the infant's medical record and communicated if the infant is transferred to another facility 1, 2, 3
The American Academy of Pediatrics and the Centers for Disease Control and Prevention recommend using only monovalent Hepatitis B vaccine for the birth dose, as combination vaccines like Vaxelis are not appropriate 4