Katherine Gallagher joined KEMRI-Wellcome Trust Research Programme through a secondment from the London School of Hygiene and Tropical Medicine in 2018. Kate is an Assistant Professor in infectious disease epidemiology and vaccine research. She completed her PhD at LSHTM in 2016 having worked at the Mwanza Intervention Trials Unit, Tanzania, on studies of human papillomavirus epidemiology and vaccine delivery. As a post-doc she was the London-based coordinator for two phase 2b trials of a prime-boost vaccine against Ebola Virus Disease and two nested observational studies in Sierra Leone. Kate is now working with Anthony Scott to lead a large randomised controlled trial to assess whether fractional doses of the two commercially available pneumonia vaccines can protect Kenyan infants as well as the full dose schedule. The results could be used to enable countries unable to afford the full cost of the pneumonia vaccine, to continue delivering it in the childhood immunization programme in the absence of external support.