👉 Epidemiology is a branch of public health that studies the occurrence, spread and transmission of diseases. It includes the study of how diseases are transmitted from one person to another, as well as factors that affect these transmission patterns. In the context of epidemiology, "epeidia" refers to the term used in medicine for the diagnosis of an infection or disease. It is a diagnostic test that uses a sample of tissue or blood to identify the presence and type of an infectious agent, such