<prompt> Most sensitive index of transmission in leprosy is?IncidenceDetection rateDisability ratePrevalence  <response>: Ans. is a i.e., Incidence Incidence rate It is the only index for measuring the effectiveness of the measures taken. It is the most sensitive index of transmission of the disease. Prevalence It provides a measure of the case-load. It is useful in the planning of treatment services. The efficacy of the drug regimen is best indicated by relapse rate. 