community health pt 2

Epidemiologists conduct investigations to better understand how disease is distributed in the population and what determines who gets sick and who does not.

• Name 2 types of studies conducted by Epidemiologists. 
• Describe each type and give an example of when these type of investigations/studies are used
• Describe in your own works Criteria of Causation and how it relates to exposure and a suspected risk factor

In a minimum of 250 words please list and compare several of the differences.