<prompt> If the prevalence is very low as compared to the incidence for a disease, it implies:Disease is very fatal andor easily curableDisease is non-fatalCalculation of prevalence incidence is wrongNothing can be said, as they are independent  <response>: Prevalence Incidence X Mean duration of the disease P I X d Incidence reflects causal factors Duration reflects the prognostic factors In the given question, prevalence is very low as compared to the incidence for a disease. Thus, d has to be low; duration of the disease can be sho under 2 circumstances: Either disease is very fatal, or Disease is easily curable 