<prompt> Typhoid Mary his known in history to cause more than 1300 cases in her lifetime. This is an example of which of the following epidemic?Common source single exposure epidemicCommon source continuous or repeated exposure epidemicLong term or secular trend epidemicPropagated epidemic  <response>: Here the carrier, infected people over a period of time and hence there was no explosive rise in patient cases. But over a long duration many people were affected. So it is a Common source continuous or repeated exposure epidemic. Ref: Parks Textbook of Preventive Medicine, 17th Edition, Page 56. 