Social & Preventive Medicine Tuberculosis control is achieved when – A Tuberculosis conversion index in infants is <1% B Prevalence on natural infection in age group 0-14 years is in order of 10% C Annual infection rate <5% D Prevalence of natural infection in 0-14 years is <1% 💡 Explanation Tuberculosis control is achieved when - ✓ Correct Answer: D. Prevalence of natural infection in 0-14 years is <1%