Epidemiology: An introduction Health Public health interventions need to be built on an evidence base and part of this evidence comes from epidemiology: the study of how and why diseases occur. Epidemiology is a bit like a game of detection. It involves identifying diseases, finding out which groups of people are at risk, tracking down causes and so on. This free course, Epidemiology: An introduction, looks at some key types of data used in epidemiology, such as statistics on death and ill health, and introduces some techniques used in analysing data. The Open University The Open University Course text/html K311_4 K311_4 en-GB Copyright © 2016 The Open University