Immunization of Preterm and Low Birth Weight Infants
Thomas N. Saari, MD the Committee on Infectious Diseases
ABSTRACT
Preterm (PT) infants are at increased risk of experiencing complicationsof vaccine-preventable diseases but are less likely to receive
immunizations on time. Medically stable PT and low birth weight(LBW)
infants should receive full doses of diphtheria, tetanus,acellular
pertussis, Haemophilus influenzae type b, hepatitisB,
poliovirus, and pneumococcal conjugate vaccines at a chronologicage
consistent with the schedule recommended for full-term infants.
Infants with birth weight less than 2000 g may require modification
of the timing of hepatitis B immunoprophylaxis depending onmaternal
hepatitis B surface antigen status. All PT and LBWinfants benefit
from receiving influenza vaccine beginning at6 months of age before
the beginning of and during the influenzaseason. All vaccines
routinely recommended during infancy aresafe for use in PT and LBW
infants. The occurrence of mild vaccine-attributableadverse events
are similar in both full-term and PT vaccinerecipients. Although the
immunogenicity of some childhood vaccinesmay be decreased in the
smallest PT infants, antibody concentrationsachieved usually are
protective.
Abbreviations: PT, preterm LBW, low birth weight VLBW,
very low birth weight ELBW, extremely low birth weight HBV, hepatitis B
virus DTaP, diphtheria and tetanus toxoids and acellular pertussis IPV,
inactivated poliovirus Hib, Haemophilus influenzae type b FT,
full-term PCV7, heptavalent pneumococcal conjugate vaccine AAP, American
Academy of Pediatrics HBsAg, hepatitis B surface antigen anti-HBs, antibody
to hepatitis B surface antigen DTwP, diphtheria and tetanus toxoids and
whole-cell pertussis OPV, oral poliovirus MCV, meningococcal C conjugate
vaccine CLD, chronic lung disease HBIG, Hepatitis B Immune Globulin
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construed or intended as providing medical or legal advice. The decision
whether or not to vaccinate is an important and complex issue and should
be made by you, and you alone, in consultation with your health care
provider.
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