Social & Preventive Medicine Disease Causation, Measurements, Milestones c52b2379 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% High-Yield Explanation Prevalence = total number of cases / total population x 100 = (650/5000) x100 =13%