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The four stages of the Epidemiological Transition Model
Transcript of The four stages of the Epidemiological Transition Model
The four stages of the Epidemiologic Transition
Pestilence and Famine
Delayed Degenerative Diseases
Some Facts About the Epidemiologic Transition
The Age of Pestilence and Famine when mortality is high and fluctuating. Average life expectancy at birth is low and variable, in the range of 20 to 40 years.
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The Black Plague was the most violent of the epidemics of stage 1.
As the Epidemiological Transition moves forward through the four stages, the life expectancy increases over time.
Poor use of ecological resources
High death rates
The average life expectancy at birth increases steadily from about 30 to 50 years.
Population growth is sustained and begins to describe an exponential curve
However, there are still problems with pandemics, (diseases that occur over a wide area). Many of these center in the industrial cities now being created that crowd people together.
The Age of Degenerative diseases is when mortality continues to decline and eventually approaches stability at a relatively low level. The average life expectancy at birth rises gradually until it exceeds 50 years.
Major health issues
Heart attacks and cancer
A decline in infectious diseases thanks to widespread use of vaccines (examples, polio, measles).
During this stage, morbidity and mortality are affected by man-made diseases, individual behaviors, and destructive lifestyles.
Epidemiology is a branch of medical science that studies the distribution of disease in human populations.
All the stages of the epidemiological transition model coincide with the demographic transition model.
This is the stage in which almost every developed country is at.
In this stage most of the population is elderly and middle aged, with few children