Ifeolu John David is a Research Manager at Innovations for Poverty Action in Sierra Leone, where he coordinates ongoing research activities. A physician and epidemiologist, he previously held faculty appointments at the University of Michigan and the University of Texas at Tyler and supported Ebola surveillance and vaccine research in Sierra Leone. His research spans vaccination, healthcare access, institutional trust, and cardiometabolic health. He holds a PhD in Health and Rehabilitation Science and an MPH in Health Policy and Promotion from the University of Missouri, Columbia, and an MBChB from the University of Sierra Leone.