Some 500,000 spinal cord injuries are sustained annually. Israel’s NurExone takes exosomes (nanoscopic particles released by cells to pass messages to one another) from bone marrow, adds siRNA to help regenerate cells, and delivers them via the nose and blood brain barrier to heal the spine.
https://nocamels.com/2024/03/nasal-therapy-that-could-help-people-with-spinal-injuries-walk-again/