Microbiology: A Systems Approach 4th Edition by Marjorie Kelly Cowan

Exercise 32

John Snow is famous for bringing a cholera epidemic to an end in London by identifying the source of infection as a contaminated water pump used by many in the city.
a. Based upon this information, explain what type of epidemic occurred and draw a curve exhibiting the incidence over time in this type of disease spread.
b. Explain whether or not identifying an index case would have helped Dr. Snow in this situation.