Epidemiology is a branch of medicine, the study of human health and disease at the population level. Epidemiology deals with the incidence, distribution, prevalence and possible control of diseases and other factors relating to health. By tracking the cause and distribution of the disease among many individuals of the population, epidemiologist can identify potential stategies for the preventing and controlling of diseases and disorders.
An epidemic can be referred to as a sudden increase in the number of occurrence of a disease or other related health events above certain limits normally expected in that community or population in that area.
