At the Dhand Lab, we move from viewing patients in isolation to understanding them as embedded in personal social networks that shape their health. We’ve developed pioneering tools—including PERSNET to quantify personal networks and SocialBit to passively sense social interaction—to understand how these networks shape recovery and health. Our research spans stroke, multiple sclerosis, concussion, and aging, revealing that social connectedness is a critical but overlooked determinant of outcomes. By integrating network science, technology, and clinical care, we aim to design scalable interventions that improve lives through stronger social ecosystems.