<prompt> Prevalence is a -RateRatioPropoionmean  <response>: . the term disease prevalence refers specifically to all current casesold and newexisting at a given point in time or over a period of time in a given population.it is the total number of all individuals who have an attribute or disease at a paicular time or during a paicular period divided by the population at risk of having the attribute or disease at this point in time or midway through the period. ref:park;s textbook of preventive and social medicine,22 nd edition ,pg no 58 