In my own opinion, the blockchain is a public legerr that ensures nothing is hidden in other to aid transparency. However, there are some things that are better kept private and one of them is medical records in other keep human decency and sanity if the medical records of an individual becomes if public knowledge, then we might have a case of mass suicide on our hands.

Area I see the blockchain working in the medical sector is on drugs produced where each and everyone of those drugs have been given a serial number and the moment I buy one or before I purchase it, I can go to the blockchain to check if its an original or a counterfeit product that will go along way in reducing the amount of counterfeits drugs in the market.