American Association for the Advancement of Science (AAAS) Jun 20 2025 Researchers present a new method to safely and preferentially generate CAR T cells directly inside the body using targeted lipid nanoparticles that deliver mRNA directly to T cells. The approach showed rapid and sustained immune reprogramming in preclinical models, highlighting its promise for treating cancer and autoimmune diseases. Adoptive immunotherapy, which harnesses a patient's own immune cells to treat disease, holds