Missing cases are detected by
Sentinal surveillance is a method of identifying the missing cases and thereby supplementing the notified cases. Helps to estimate disease prevalence. Repoing bias minimized. Note: India is the 1st country to have Sentinal surveillance set up for follow up of cataract surgeries. Ref: Park's Textbook of Preventive and Social Medicine; 24th edition - Page no. 45
Active surveillance
Passive surveillance
Sentinel surveillance
Prevalence rate
Concept of health and disease