EMBODY (Engineering of Immune Cells Inside the Body) is an ARPA-H program focused on developing adaptable, lower-cost ways to give cells instructions inside the body. Its research areas include cell-specific delivery and programmable genetic material, along with production and validation methods such as quality control and predictive preclinical models. The program aims to support approaches that could retrain immune cells for a range of conditions, including autoimmune diseases, hard-to-treat infections, and solid tumors. These are program goals, not established treatment outcomes.