Disease can be defined as any  condition which result in the disorder of a structure or function in a living organism that is not due to any external injuries.

There are several theories of disease causation, the focus of this paper will be on the following theory of disease, namely; The Demonic Theory, The Punitive Theory, The Miasmic Theory, Germ Theory, Supernatural Theory Of Disease, Ecological Theory, Multifactorial Causation Theory, Fracastoro And The Contagion Theory, Hahnemann And Homoeopathy Theory, Web Causation Theory, Diathesis–Stress Theory, Psychosomatic Theory Of Disease, Christian Science Theories, Cellular Theory.

Theories of disease causation by Rotimi Ojo

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