Immunisation during pregnancy is a vital strategy to protect infants from infectious diseases in their first months of life. Drawing on administrative data from New Zealand, I analyse the relationship between birth order, maternal vaccination against pertussis and influenza, and subsequent...

Childhood immunisation coverage in New Zealand has fallen since 2016, with the decline accelerating during the COVID-19 pandemic. Using administrative data from Stats NZ's Integrated Data Infrastructure, we examine determinants of immunisation uptake and how these have changed over time. We find...