This book elicits a critical reflection and understanding of the purpose and context of quantitative research and the basis for selecting appropriate research designs grounded on the uses and methods of epidemiology. It includes key statistical concepts and techniques needed for the basic analysis of data, with some intriguing practical examples to help your grasp along the way. Some of the main topics covered in this book include: scientific method and introductory concepts; routine data sources and descriptive epidemiology; surveys; cohort studies; case control studies; and critical appraisal of research evidence. Some of the intriguing discussions include: the biomedical and social research paradigms; influences of the dimension and philosophy of science; ecological fallacy; vaccinations; reflections on the discovery of antiretroviral drugs; demographic, health effect, and population-based health data; and accuracy and implications of data recorded on death certificates, amongothers.