University of Washington Oct 10 2025 Targeted drug delivery is a powerful and promising area of medicine. Therapies that pinpoint the exact areas of the body where they're needed - and nowhere they're not - can reduce the medicine dosage and avoid potentially harmful "off target" effects elsewhere in the body. A targeted immunotherapy, for example, might seek out cancerous tissues and activate immune cells to fight the disease only in those tissues.  The tricky part is making a therapy truly "