Public health research is the study of health trends, diseases, and factors affecting the health of populations. It aims to identify health issues, understand their causes, and develop strategies to improve community health. Researchers often analyze data from various sources, including surveys and health records, to inform public health policies and programs. This field encompasses various topics, such as epidemiology, biostatistics, and health promotion. Public health researchers work with organizations like the World Health Organization and local health departments to address issues like infectious diseases, chronic illnesses, and health disparities among different populations.