Adanna is a Senior Health Specialist in the Health, Nutrition, and Population Global Practice, where she leads the design, implementation, and evaluation of investment operations. She has over ten years of experience advising national reforms to improve access to high-quality health care, through service delivery organization, strategic purchasing, revenue mobilization, and demand generation, including in Sri Lanka, Sierra Leone, India, Moldova, Tajikistan, the South Caucasus Countries, and Romania. She has published on health care financing, access, and quality in peer-reviewed journals, including the Bulletin of the World Health Organization and Social Science and Medicine. Adanna obtained a medical degree from the University of Nigeria, a Master of Science in Global Health from the University of Oxford, and a Doctor of Science in Health Systems from Harvard University.