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Kaplan–Meier curves of AII duration by 5 testing strategies: 3 smears, 2 smears, 1 Xpert concentrated, 1 Xpert unconcentrated, and 2 Xperts. Abbreviations: AII, airborne infection isolation; conc., concentrated sputum sample; IQR, interquartile range; Smears, acid-fast bacilli sputum smear microscopy; unconc, unconcentrated; Xpert, Xpert MTB/RIF assay.
