Dynamics of the epidemiological and nutritional transition in developing countries and appearance of covid 19: Overview

The burden of chronic no communicable diseases has increased further, making these diseases the leading cause of death and disease worldwide. The aging of the population and public policies aim to shed light on the debates concerning the issues linked to major demographic changes. Our review returns to the concept of epidemiological transition, seeks to illustrate its evolution in developing countries and to make the link with the origin and characteristics of the nutritional transition. Then we will discuss the global burden of chronic diseases highly concentrated in developing countries. At the end, a section is devoted to changing the global health landscape with COVID 19 infection