The pattern of change of disease trends of moality and morbidity where the pandemics infection are replaced by degenerative and man-made disorders, the main cause of morbidity and the most frequent cause of fatality is known as:

Epidemiological transition is a phase of development witnessed by sudden and stark increase in population growth rates brought about by medical innovation in disease or sickness therapy and treatment And followed by a releveling of population growth from subsequent declines in feility. Ref: Health Transition Epidemiological transition theory was originally given by Abdel Orman in 1971.