<prompt> Prevalence of a disease -Is the best measure of disease frequency in etiological studiesCan only be determined by a coho studyIs the number of new cases in a defined populationDescribes the balance between incidence, moality and recovery  <response>: Ref : Parks 23rd edition pg 61 Prevalence values describe the balance between incidence, moality and recovery. Increased incidence can increase prevalence. Increased moality decreases prevalence. Increased recovery also decreases prevalence. Note : Incidence is the best measure of disease frequency in etiological studies coho study 