HIV Sentinel Surveillance under NACP estimates HIV prevalence in the general population using samples collected from which sentinel sites, and at what interval?

• A Blood banks, surveyed annually
• B School health surveys, once every five years
• C Tuberculosis clinics, in continuous passive reporting
• D Antenatal clinic attendees, in biennial rounds ✓

Explanation

Unlinked anonymous testing of women attending antenatal clinics serves as the proxy for HIV prevalence in the general population, because ANC attendees represent the sexually active reproductive-age group. These sentinel rounds are conducted every two years. Key populations such as female sex workers, men who have sex with men and people who inject drugs are tracked through separate high-risk group sites using different sampling methods, so blood bank and TB clinic data do not serve this purpose.

Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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