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A) Cut-offs for positive and negative IGRA TB-SPOT.TB assays, including grey zone. B) Study flow of HIV-infected women with initial negative IGRA (TB-SPOT.TB) at 32 weeks’ gestation with repeated IGRA testing at 12 months postpartum. SFC = spot-forming cells; IGRA = interferon-gamma release assay; HIV = human immunodeficiency virus.
