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. 2021 Mar;27(3):805–812. doi: 10.3201/eid2703.203916

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Incidence rate ratios for effectiveness of preventive therapy using data from published studies and a summary measure in study of preventive therapy for persons exposed at home to drug-resistant tuberculosis, Karachi, Pakistan, February 2016–March 2017. Solid line on y axis indicates null. Dotted line indicates pooled estimate of preventive therapy effectiveness. Blue diamond indicates 95% CI. Small diamonds indicate point estimates of preventive therapy effectiveness using data from each study with its CI. IRR, incident rate ratio.