Disease epidemiology is the study of how diseases affect populations. It focuses on understanding the distribution, patterns, and causes of health-related events in specific groups. Epidemiologists collect data to identify risk factors and trends, which helps in developing strategies for disease prevention and control. By analyzing information about diseases, such as COVID-19 or diabetes, epidemiologists can determine how these conditions spread and impact different communities. This knowledge is essential for public health officials to implement effective interventions, allocate resources, and improve overall health outcomes in the population.