Which of the following increases the prevalence of the disease-
Ans. is 'd' i.e. Increase in duration of disease 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.
Immigration of healthy people
Increase in cure rates
Decrease in the number of new cases
Increase in duration of disease
Epidemiology