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Medical records
There are lot of problems in record keeping, authentication and transferring of records at a global scale, even after having electronic records, are difficult when implemented practically. Due to no common third party, a lot of records are maintained physically and are prone to damage or loss.
During a case of epidemiology, it becomes essential to access and mine medical records of patients pertaining to a specific geography. Blockchain comes as a boon in such situation, since medical records can be easily accessible if stored in the blockchain, and they are also secure and private for the required users.