https://www.cigna.com/knowledge-center/hw/measurement-of-a-tuberculin-skin-test-reaction-zm2556
Two to three days after getting a tuberculin skin test, the size of any bump at the site is measured. Your risk of having TB is used along with the size of the...
tuberculin skin testmeasurementreactioncigna
https://www.cdc.gov/mmwr/volumes/68/wr/mm6824a4.htm?s_cid=mm6824a4_e&deliveryName=USCDC_921-DM2625
CDC recommends general approaches to prevent a reduction in tuberculin skin testing capability resulting from the expected shortage of Aplisol.
tuberculin skin testnationwideshortageantigenscdc