Effect of maternal immunisation with multivalent vaccines containing inactivated poliovirus vaccine (IPV) on infant

Nicholas C Grassly1, Nick Andrews2, Gillian Cooper3

  • 1MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, Imperial College London, UK.

Vaccine
|January 23, 2023
PubMed

Insights

Maternal immunization with diphtheria, tetanus, acellular pertussis and inactivated poliovirus vaccine (DTaP/IPV) in the UK may reduce infant protection against polio. Infants born to vaccinated mothers showed lower antibody responses to inactivated poliovirus vaccine (IPV).

Area of Science:

  • Immunology
  • Vaccinology
  • Public Health

Background:

  • The UK introduced maternal immunization with diphtheria, tetanus, acellular pertussis and inactivated poliovirus vaccine (DTaP/IPV) in 2012.
  • Maternal vaccination aims to protect infants from vaccine-preventable diseases during their first months of life.

Purpose of the Study:

  • To evaluate the impact of maternal DTaP/IPV immunization on the infant immune response to inactivated poliovirus vaccine (IPV).
  • To assess poliovirus-specific neutralizing antibodies in infants at 2, 5, and 13 months of age.

Main Methods:

  • A randomized, phase 4 study compared infants born to mothers receiving DTaP/IPV during pregnancy versus a non-randomized group whose mothers did not receive the vaccine.
  • Poliovirus-specific neutralizing antibodies were measured at 2, 5, and 13 months of age.

Main Results:

  • Infants born to mothers who received DTaP/IPV showed significantly lower seroconversion rates after three IPV doses compared to infants of unvaccinated mothers.
  • At 13 months, seropositivity for poliovirus types 1-3 was lower in the DTaP/IPV maternal immunization group (57.2%, 42.6%, 37.0%) compared to the control group (90.9%, 90.9%, 70.0%).

Conclusions:

  • Maternal DTaP/IPV immunization in the UK may lead to suboptimal protection against poliomyelitis in infants until their pre-school booster vaccination.
  • Further research is needed to optimize infant immunization schedules in the context of widespread maternal vaccination programs.

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