This 116-page introductory epidemiology book provides an elementary approach to understanding infectious disease outbreaks. This book is perfect for anyone with an ambition to learn about health-related concepts and take on an intellectual challenge, including those with little to no background in public health. The book aims to spread awareness about epidemiology so that people can understand the impact of their actions and act responsibly in the future, as well as make the general population more prepared for the next public health crisis. This book provides a friendly introduction to topics such as infectious diseases, epidemiological study designs, and a step-by-step breakdown of the COVID-19 pandemic.