Principles of epidemiology.. Homogeneity of the individual with society and adaptation to conditions and lack of mental and mental illness

1- The social aspect, which provides the living conditions of income, education, health care, food, drink, adequate housing, clothing and stability of life.
2- mental aspect is the homogeneity of the individual with the community and adapt to the conditions and the absence of mental and mental illness.
3- the physical aspect of the safety of the organs of the body and the absence of diseases and disabilities.