a.
To explain:
The type of epidemic that occurred by cholera, and also draw a curve exhibiting the incidence over this time in cholera spread.
Concept introduction:
Epidemic is a widespread or outbreak of an infectious disease in a particular area at a particular time. During an increase in a disease at a given area, it can be helpful to observe and analyze the epidemic curve. Epidemic curve can be of three types: common source, point source and propagated epidemic.
b.
To explain:
Whether or not identifying an index case would have helped Dr. Snow while bringing cholera to an end.
Concept introduction:
Epidemic is a widespread or outbreak of an infectious disease in a particular area at a particular time. Index case is a term that refers to the first patient, found in an epidemiological investigation.
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