<prompt> Measures involved in sentinel surveillance includes all of the following exceptIdentifying missing cases in notification of diseasesIdentifying new cases of infectionIdentifying old and new casesIdentifying cases free of disability  <response>: Sentinel Surveillance : Monitoring of rate of occurrence of specific conditions to assess the stability or change in health levels of a population, It is also the study of disease rates in a specific cohort, geographic area, population subgroup, etc. to estimate trends in larger population ; For e.g. Use of health practitioners to monitor trends of a health event in a population 1. Sentinel Surveillance helps in identifying missing cases and supplementing notified cases. 