Which of the following statements is the most accurate definition?

A) Active surveillance often gathers disease data from all potential reporting health care providers.
B) Passive surveillance provides stimulus to health care providers in the form of individual feedback or other incentives.
C) Sentinel surveillance is a type of surveillance based on selected population samples chosen to represent the relevant experience of particular groups.
D) Active surveillance is continuous analysis, interpretation, and feedback of systematically collected data, generally using methods distinguished by their practicality, uniformity, and rapidity rather than by accuracy or completeness.
E) Passive surveillance is an observational investigation, usually descriptive, in which information is systematically collected.

Sentinel surveillance is a type of surveillance system.Instead of attempting to gather surveillance data from all health care providers,a sentinel surveillance system selects,either randomly or intentionally,a small group of healthproviders from whom to gather data."Active surveillance often gathers disease data from all potential reporting health care providers" is not correct.Active surveillance stimulus to health care providers in the form of individual feedback or other incentives.In active surveillance,providers contacted on regular basis to collect information.It is more resource intensive and mostly used for outbreak investigations or pilot studies."Passive surveillance provides stimulus to health care providers in the form of individual feedback or other incentives" is not correct.Passive surveillance gathers disease data from all potential reporting health care providers.It is the most common type of surveillance.Providers are responsible for reporting."Active surveillance is continuous analysis,interpretation,and feedback of systematically collected data,generally using methods distinguished by their practicality,uniformity,and rapidity rather than by accuracy or completeness" is not correct.This is one of the general definitions of surveillance.Surveillance is also defined a systematic and continuous collection,analysis,and interpretation of data,closely integrated with the timely and coherent dissemination of the results and assessment to those who have the right to know so that action can be taken."Passive surveillance is an observational investigation,usually descriptive,in which information is systematically collected" is not correct.A survey is an observational investigation,usually descriptive,in which information is systematically collected.