<prompt> Which of the following increases the prevalence ofthe diseaseaEURImmigration of healthy peopleIncrease in cure ratesDecrease in the number of new casesIncrease in duration of disease  <response>: Increase in duration of disease Ref: Park 20e, p 58 19e, p 56, 57J Prevalence refers to all current cases old new existing at a given point in time point prevalence or over a period of time period prevalence in a given population It thus includes all the new cases, as well as those old persisting cases. It depends on 2 factors i. incidence of disease I ii.duration of disease D Thus, the longer the duration of disease, the greater its prevalence. 