Figure 4From: Target prioritization and strategy selection for active case-finding of pulmonary tuberculosis: a tool to support country-level project planning Cost-effectiveness of tuberculosis active case-finding. (a) Cost per case detected by diagnostic strategies and (b) the Number Needed to Screen (NNS) to detect a case in a hypothetical country with TB prevalence of 0.5% (500 per 100,000 population).Back to article page