Dataset and supporting documentation collected as part of the Entebbe Mother and Baby Study (EMaBS), a clinical trial that investigated potential benefits of treating worm infections during pregnancy and early childhood. The dataset contains variables collected from mothers (at registration) and infants (when the child was one-year of age), including maternal age, education, parity and infection status (malaria, S. mansoni, hookworm, filariasis), and infant sex and immune responses (to HiB, diphtheria, Hepatitis B, pertussis, FHA, pertactin). Data was collected as part of a randomised control trial, ISRCTN32849447. Pregnant women who enrolled were randomised twice in this 2x2 factorial trial of albendazole and praziquantel to investigate the effect of maternal worms on infant vaccine response in urban Uganda. All personal identifiable variables have been removed, including maternal date of birth, infant date of birth, home location and dates of vaccinations.