Maternal vaccination to prevent neonatal infections and combat antimicrobial resistance

Maternal vaccination during pregnancy is emerging as a powerful strategy in protecting newborns from infectious diseases, improving neonatal outcomes, and potentially reducing antimicrobial use and resistance. Maternal immunisation works by eliciting protective antibodies in the mother that are transferred to the fetus transplacentally and through breastmilk postnatally to provide the infant with passive immunity during the first vulnerable months of life. There is sufficient evidence to support the role of maternal vaccination in averting many neonatal infections that would otherwise require medical intervention. By preventing infections in mothers and their newborn, maternal vaccination also holds significant potential for reducing antimicrobial use and antimicrobial resistance. Fewer neonatal infections translate to a reduced need for antimicrobial use in the neonatal period and in postpartum women, therefore lowering the selective pressure for drug-resistant bacteria. Routine maternal vaccines (tetanus, diphtheria, acellular pertussis (Tdap), influenza, COVID-19, respiratory syncytial virus) already confer measurable antibiotic-sparing benefits by preventing infections that typically trigger antimicrobial therapy in mothers and neonates. Pipeline candidates (Group B Streptococcus, Klebsiella pneumoniae, Escherichia coli) could further lower neonatal sepsis burden, reducing broad-spectrum antimicrobial use in neonatal intensive care units to help slow antimicrobial resistance. Integrated with antibiotic stewardship and infection-prevention measures, maternal immunisation offers a practical, scalable practice to limit perinatal antibiotic exposure.