IFNG and tuberculosis: The expansion of insurance coverage of preventive care services through the Affordable Care Act,11 the availability of more specific interferon-gamma release assay (IGRA) tests [i.e., QuantiFERON (QFT) and T-SPOT.TB (T-SPOT)] and safer rifampin-containing TB preventive treatment regimens12 all have the potential to accelerate TB elimination efforts through primary care.