Abdel r omran biography of abraham

          A theory of the epidemiology of population change was first raised by Abdel R. Omran in () and it had originated from the demographic transition.

        1. Lindsey and Abdel Omran.
        2. Freymann as its first director.
        3. ABDEL R. OMRAN, MD, DrPH.
        4. Introduction.

          5. Freymann as its first director....

          Epidemiological transition

          A term in demography

          In demography and medical geography, epidemiological transition is a theory which "describes changing population patterns in terms of fertility, life expectancy, mortality, and leading causes of death."[1] For example, a phase of development marked by a sudden increase in population growth rates brought by improved food security and innovations in public health and medicine, can be followed by a re-leveling of population growth due to subsequent declines in fertility rates.

          Such a transition can account for the replacement of infectious diseases by chronic diseases over time due to increased life span as a result of improved health care and disease prevention.[2][3] This theory was originally posited by Abdel Omran in 1971.[4][5]

          Theory

          Omran divided the epidemiological transition of mortality into three phases, in the last of which chronic diseases replace infection as the