Epidemiology is the study of diseases in relation to who they affect, where they are rampant and when they are predominant. Didactic epidemiology is a book that will help the reader understand the study in the most lucid possible way. The book describes the history of diseases and the scholars, most notably Hippocrates,John snow among others. Definition of terms and habitual terminologies concomitant with the study are mentioned systematically to seamlessly introduce the reader to the subject matter. The book covers both general and applied epidemiology. Did you know different diseases affect different persons depending on their age, gender, race and even tribe? The book explores different epidemiological studies and measures in morbidity. With an increase in pandemic diseases and the focus shifting from communicable to non-communicable, the book expounds public health and the importance of presumptive identification of unrecognized diseases in an apparently healthy, asymptomatic population by means of tests, examinations or other procedures that can be applied rapidly and easily to the target population. Diseases ought to be attacked before they attack and the book offers a good platform to comprehend strategies in primary health care.