Social & Preventive Medicine In a population of 5000, number of new cases of TB is 500; old cases in the same population are 150. What is the prevalence of TB: A 9% B 12% C 13% D 18% 💡 Explanation In a population of 5000, number of new cases of TB is 500; old cases in the same population are 150. What is the prevalence of TB: ✓ Correct Answer: C. 13%