Sentinel surveillance is used to detect: March 2009, March 2013 (e)
Ans. B: Missed cases The main objectives of surveillance are: To provide information about new and changing trends in the health status of population To provide feedback which may be expected to modify the policy Provide timely warning of the public health disasters so that timely interventions can be mobilized. Sentinel surveillance is a method for identifying all the missing cases and thereby supplementing the notified cases.
New cases
Missed cases
Old cases
Reference cases