Spatial Epidemiology: John Snow and the 1854 Cholera Outbreak

How do scientists track, map, and stop the spread of deadly diseases? The answers began with a pioneering investigation in Victorian London that changed the course of public health forever. In this introductory course, you will explore the foundational principles of epidemiology and spatial analysis by examining John Snow’s legendary study of the 1854 cholera epidemic in Soho. You will discover how mapping data can uncover patterns, challenge established scientific dogmas, and save lives. What you'll learn: * Understand the fundamental concepts of epidemiology and disease transmission. * Analyze John Snow's historic investigation and his revolutionary use of spatial data mapping. * Evaluate the scientific shift from the miasma theory of disease to modern germ theory. * Apply basic spatial analysis techniques used to pinpoint the source of localized outbreaks. * Explore how modern geographic information systems (GIS) and digital tracking tools build on these classical methods. This course begins with key terminology and foundational public health concepts before diving deep into the historical Soho case study. You will read through the step-by-step logic of the investigation and see how those same analytical frameworks are used to combat modern global health crises. This course is designed for absolute beginners, history enthusiasts, and aspiring public health professionals. No prior background in medicine, statistics, or mapping is required. Start reading today to discover how data visualization and scientific inquiry protect communities worldwide.