In 2017-2018, startups like MedRec and BurstIQ began applying blockchain to patient data management and secure medical records
MedRac was developed by MIT researchers, including John Halamka and Ariel Ekblaw.

MedRec used Ethereum to enable patient controlled medical records, integrating with hospital databases and incentivizing researchers to validate transactions for data access.

Why it didn't take off 👆👆

MedRec remained a research project rather than a commercial product, facing scalability and hospital adoption challenges before the team shifted focus to other blockchain healthcare initiatives.