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Education and Training: College, graduate degree, and possibly medical school Salary: Median-$54,800 per year Employment Outlook: Good Definition and Nature of the Work Epidemiologists are medical scientists who investigate and describe factors that influence the development of disease, disability, and other health outcomes. They formulate means for prevention and control.

it tells the history about smallpox.

Hi Elizabeth--Try to avoid using About.com as a source. Instead, look for educational websites related to schools, museums, libraries, and research organizations. If you must, look at Wikipedia to see what sources are cited at the bottom of the page. That's a good place to start.

Here is the History of Chocolate website I used. I found all of my information on this ONE website

all of it is good