Final answer:
The transition described is the Epidemiological transition, a part of the demographic transition process where a country experiences a shift from infectious diseases to chronic diseases as the main cause of death.
Step-by-step explanation:
The transition you are asking about is the Epidemiological transition, which is part of the broader concept of the demographic transition.
The demographic transition involves changes a country experiences as it develops, moving from high birth and death rates to low birth and death rates, often as a result of improved medical technologies and health services, better education, and economic developments.
However, the epidemiological transition specifically refers to the shift in the primary causes of death and disease patterns.
As a country develops and transitions through the stages of the demographic transition, causes of death often move from infectious and communicable diseases, like measles, to non-communicable diseases, such as heart disease.
This shift indicates that the country is likely moving from an earlier stage of the demographic transition, characterized by high death rates primarily from infectious diseases, to a later stage with low death rates and higher instances of chronic and degenerative diseases.