Biological, nutritional, chemical, physical, and social are the five agents recognized today. As Germ theory provided a framework for understanding the causal agents of disease.
<h3>What is Germ theory?</h3>
The germ theory is a school of thought in medicine that holds that some diseases are caused by tiny, microscopic, body-invading organisms that can only be seen under a microscope.
The "one pathogen to one disease" paradigm was built on the germ concept of disease, which Robert Koch put forth in the late 19th century and had an impact on the development of diagnostic microbiology in medicine.
Thus, Biological, nutritional, chemical, physical, and social are the five agents recognized today.
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The only change I know of was the silk road, where they had to build roads and clear forests so that traders could go through. I don't think any other geography changed during that era.
Answer:
Arab power was background of the spread.
Explanation:
- The Muslims conquest after the death of the Mohammed led to the occupying of the vast majority of the areas and conversion of the Islam followed and this boosted the missionary activities of the imams. With the Muslim conquest spread through the middle east and the Arabic empire expanded by the spread and had its roots in the Arabic world united under the Mohammad.
