<prompt> True about Sentinel surveillance of HIV AIDS by NACO are all except:Yearly checkup is donePregnant females age 15-49 years are includedHelps reduce antenatal HIV transmissionTarget high risk population  <response>: HIV sentinel surveillance Frequency Biennial once every 2 years - Option-1 is wrong Type of study Cross-Sectional Survey Objectives 1. Determine level of HIV infection in general and high-risk population 2. Understand trends of HIV epidemic 3. Understand geographical spread and identify emerging pockets 4. Provide information for prioritization of programme resources and evaluation of programme impact 5. Estimate HIV prevalence and HIV burden in the country - Pregnant females age 15-49 years are included it helps to reduce antenatal HIV transmission. 