HIV sentinel surveillance is used for:
ADetection of high-risk group
BPrevalence of HIV infection
CMonitoring trends in HIV infection
DMonitoring disease trends
Why is sentinel surveillance preferred over passive surveillance in STI control programs?
AEliminates reporting bias
BCovers larger population
CProvides more detailed and accurate data from selected sites
DRequires less resources
All of the following are characteristics of case control study except:
AQuick results are obtained
BMeasures incidence rate
CInexpensive study
DProceeds from effect to cause
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