This book is the first authoritative study of the research output and scientific impact of Nigerian health academics, including those in the diaspora. Around the world, policymakers and academics measure the scientific impact of research at national and international levels using bibliometric measures. Unfortunately, there is limited data on scientists  research productivity and impact in developing countries, particularly in Africa. Therefore, normative bibliometric information from different countries is needed to address the challenges faced by scientists in Africa. This book contributes to filling this research gap. Additionally, the author addresses the controversies surrounding the use of bibliometrics in judging research productivity and offers recommendations to improve research systems.