Epidemiology is the division of medicine that deals with the distribution of health in various groups of people and the determinants of issues related to health. As the fundamental science of public health, epidemiology explains the causes of diseases, the frequency of outbreaks, and their risk factors in various populations. Through the data collected in this study, governments can formulate health policies that help in finding the treatments for different disease as well as their preventive measures. This paper, therefore, explains the role of epidemiology in the community.