Chinese scientists achieve diabetes cure through innovative cell therapy, detailed in Cell Discovery. Patient, treated in July 2021, no longer requires insulin after eleven weeks, and is now medication-free for 33 months. The breakthrough, praised by Timothy Kieffer, signifies a major advancement in diabetes treatment. This novel approach utilizes the body's regenerative abilities and could alleviate China's healthcare burden. Further studies are needed for validation.
I believe that it states somewhere that it was a case study or a proof of concept. Which is a common approach to interventions (medical or otherwise) that are difficult, expensive, and time consuming. If you can find a way to get it to work then maybe it’s worth expanding and finding more efficient/effective ways of implementing the intervention.