This book is a one-stop source of information regarding Epidemiology, providing readers with the knowledge about advanced study and practices of Epidemiology. It is a compilation of research works by different experts providing an overview on specific subjects related to epidemiology. It exemplifies some of the interests, applications and views of the epidemiology across different areas of research and practice. Unlike the comprehensiveness and coherence of a conventional textbook, readers will find a few independent topics, each of them with substantial information in specialized areas within epidemiology. They discuss the contrast between the effort to extend the limits of applicability of epidemiological research and the "regular" scientific operations in the field of applied epidemiology. This book will prove to be a valuable and inspiring source of reference for all experts in the field of epidemiology.