Lukas Engelmann (University of Edinburgh) joins Merle and Lee to discuss the history of epidemiology. The conversation begins by thinking about epidemiology as a discipline as well as the gap between the discipline and scholars who use epidemiology. After discussing the development of epidemiology, including in the context of Covid-19, the interview moves to reflect upon infectious disease models, which have become especially popular in the recent pandemic. Some of the advantages and disadvantages of models are discussed, as well as some of the different approaches in how to evaluate them.