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Updated: Jul 10, 2026

Intranasal Immunization and Milk Collection in Studies of Maternal Immunization in New Zealand White Rabbits (Oryctolagus cuniculus)
Published on: July 31, 2021
[Immunization of the preterm infant]
J Gaudelus1, S Lefèvre-Akriche, C Roumegoux
1Service de pédiatrie, CHU Jean-Verdier, avenue du 14 juillet, 93140 Bondy, France. joel.gaudelus@jvr.aphp.fr
Insights
Premature infants require timely vaccinations, including pertussis and pneumococcal vaccines at two months. Follow the standard immunization schedule, with special monitoring for infants under 32 weeks gestational age due to potential apnea risks.
Area of Science:
- Neonatal immunology
- Vaccinology
- Pediatric infectious diseases
Background:
- Premature infants face higher risks of vaccine-preventable diseases.
- Immune system maturation in premature infants is comparable to term-infants.
- Early environmental antigen exposure stimulates immune responses.
Purpose of the Study:
- To outline the recommended immunization schedule for premature infants.
- To highlight specific vaccine recommendations for premature infants.
- To address safety considerations during infant vaccination.
Main Methods:
- Review of current vaccination guidelines for premature infants.
- Analysis of immune response maturation in preterm neonates.
- Assessment of safety data regarding infant vaccinations.
Main Results:
- Premature infants should receive vaccinations starting at two months of age, regardless of gestational age.
- Acellular Pertussis and pneumococcal conjugate vaccines are recommended at two months.
- The standard pentavalent vaccine schedule applies, with specific considerations for Hepatitis B vaccine at birth for low birth weight infants.
Conclusions:
- Standard immunization schedules are appropriate for premature infants.
- Vaccination timing is crucial for protecting premature infants against infectious diseases.
- Cardiorespiratory monitoring is advised for infants under 32 weeks gestational age post-vaccination.
Abstract:
Premature infants have an increased risk of experiencing infectious diseases, some of which are vaccine preventable diseases. Maturation of immune responses begins with exposition to environmental antigens and in premature infants as fast as in term-infants. Premature infants must be vaccinated at 2 months of age, whatever the gestational age. Acellular Pertussis vaccine and pneumococcal conjugate vaccine must be given as early as possible, at two months of age. Immunization schedule in premature infants is the same as in full-term infants : three injections one month apart with a pentavalent vaccine : Diphteria, Tetanus, Poliomyelitis, Pertussis and Haemophilus type b. First injection of hepatitis B vaccine must not be taken in account when this vaccine is given at birth to infants under 2 kg birth weight. Premature infants 6 months of age or older and experiencing chronic lung disease have to be vaccinated against influenza. In all cases, surroundings have to be vaccinated. Apnea and/or bradycardia have been reported within the 48 hours following vaccination in premature infants before 32 weeks of gestational age and justify giving their first injection of vaccine under cardiorespiratory monitoring. These injections will be given before discharge as often as possible.
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