Moroccans descended from Berbers, Arabs, and Black Africans exactly like the neighboring Maghrebians. The Berbers are the prehistoric populations of Morocco and are related to the wider group of Paleo-Mediterranean peoples. The Afroasiatic family may have originated in the Mesolithic period, perhaps in the context of the Capsian culture.
Epidemiologic triangle model of disease causation. A common model used in public health illustrates the relationships among an agent, a host and the environment. It applies to biological, chemical and physical agents.
Medical Definition of epidemiology. plural. epidemiologies. 1: a branch of medical science that deals with the incidence, distribution, and control of disease in a population. 2: the sum of the factors controlling the presence or absence of a disease or pathogen.