The live attenuated BCG vaccine is the only vaccine currently licenced for the prevention of tuberculosis disease (TB) caused by Mycobacterium tuberculosis (M.tb) and is administered to over 120 million infants each year.102 NK cells are an important component of the cellular immune response to BCG, producing more than half of the total IFN‐γ after vaccination in newborns and 2‐month‐old infants.102. Here, IFNG is linked to tuberculosis.