Final answer:
Epidemiology is the field that identifies and locates populations at risk, gathers information on health concerns, and informs on services and interventions. An epidemiologist collects data and develops strategies for disease prevention and control, significantly impacting public health policies and practices.
Step-by-step explanation:
The method that locates populations and provides information about the nature of certain health concerns, suggests what can be done, and guides how services can be obtained is known as epidemiology. An epidemiologist plays a crucial role in public health by studying the occurrence, distribution, and determinants of health and diseases in populations. They collect data, track disease spread, and work in collaboration with other scientists to develop strategies and public health policies aimed at reducing the incidence of diseases and preventing their spread. This scope of work is essential for informing health agencies on how to obtain data about the incidence of diseases and plays a pivotal role in designing sustainable health education and disease prevention interventions that lead to better health outcomes.