Specimen: Collect 1 mL Whole blood each in a set of special QuantiFERON-TB Gold tubes available from Medilab. Shake the tubes vigorously at least 10 times to ensure thorough mixing. DO NOTCENTRIFUGE. Ship at room temperature to reach lab within 16 hours OR Incubate the tubes immediately at 37°C for 16-24 hours and centrifuge. Ship...