(CAR)T cells, also known as chimeric antigen receptor T cells, have transformed the landscape of cancer treatment. Instead of a standard chemotherapy, CAR-T treatment involves taking a patient's blood cells, engineering them in a lab to specifically attack cancer cells, and then injecting them back in the patient. The advent of in silico and in vitro has propelled our understanding of cancer biology and allowed us to make such leaps in cancer care. In this episode, Dr. Brian McIntosh of Covance describes these cells, how their safety or efficacy are evaluated, explains how these nontraditional precision medicines contribute to the patient’s journey and he shares his thoughts on the future of this type of cancer immunotherapy during this ACT ToxChats.