Social & Preventive Medicine Under the National Leprosy Elimination Programme, mass survey for leprosy is done if prevalence of leprosy is more than: A 1/1000 B 5/1000 C 10/1000 D 20/1000 💡 Explanation Under the National Leprosy Elimination Programme, mass survey for leprosy is done if prevalence of leprosy is more than: ✓ Correct Answer: C. 10/1000