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Published on: July 31, 2021
Immunization of preterm infants
Arnaud Gagneur1, Didier Pinquier2, Caroline Quach3
1a Department of Pediatrics ; Faculty of Medicine and Health Sciences, University of Sherbrooke ; Sherbrooke , Québec , Canada.
Insights
Preterm infants benefit from early vaccination schedules, similar to full-term infants, to protect against vaccine-preventable diseases. Special attention to the hepatitis B vaccine is needed for low-birth-weight infants.
Area of Science:
- Pediatrics
- Immunology
- Vaccinology
Background:
- Premature infants face higher risks of vaccine-preventable diseases.
- Vaccinations are often delayed in preterm infants, despite their vulnerability.
Purpose of the Study:
- To review current knowledge on vaccine response, protection, safety, and tolerability in preterm infants.
- To provide evidence-based recommendations for vaccinating preterm infants.
Main Methods:
- Review of available data on immune response to vaccines in preterm infants.
- Analysis of protection derived from routine immunization in this population.
- Evaluation of vaccine safety and tolerability in preterm infants.
Main Results:
- Early immunization without correcting for gestational age is supported by available data.
- While initial antibody response may be lower, protective levels and memory are often achieved.
- Vaccines are immunogenic, safe, and well-tolerated in preterm infants.
Conclusions:
- Preterm infants should follow standard vaccination schedules, except for hepatitis B vaccine.
- Additional hepatitis B vaccine doses are recommended for low-birth-weight infants (<2000g) due to reduced immune response.
Abstract:
Vaccinations of premature infants are often delayed despite being at an increased risk of contracting vaccine preventable diseases. This article reviews the current knowledge on the immune response to widely used vaccines, on the protection derived from routine immunization and on vaccine safety and tolerability in a population of preterm infants. Available data evaluating the immune response of preterm infants support early immunization without correction for gestational age. For a number of antigens, the antibody response to initial doses of vaccines may be lower than that of term infants, but protective concentrations are often achieved and memory successfully induced. Vaccines are immunogenic, safe and well tolerated in preterm infants. Preterm infants should be vaccinated using the same schedules as those usually recommended for full-term infants, with the exception of the hepatitis B vaccine, where additional doses should be administered in infants receiving the first dose during the first days of life if they weighed less than 2000 g because of a documented reduced immune response.
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