Generation Bio Co. is a biotechnology company that discovers, develops, and commercializes redosable therapeutics designed to reprogram T cells in vivo, aiming to reduce or eliminate the production and persistence of autoreactive T cells. It develops cell-targeted lipid nanoparticles (ctLNP) to selectively deliver small interfering RNA (siRNA) to T cells, a selective, intracellular, and genetically precise mechanism of target engagement that could unlock high-value, historically undruggable disease-driving genes in autoimmunity. The company was formerly known as Torus Therapeutics, Inc. and changed its name to Generation Bio Co. in November 2017. Incorporated in 2016, it is headquartered in Cambridge, Massachusetts.