This decentralized health care will keep all the record of the patient. So patient doesn't need to carry all the papers. he/she just keep the patient Id. If patient delegate his patient id to any doctor. So, doctor can see all the past appointments , reports, diseases, allergy, expenses for treatment, Insurance of patient etc. And on the basis of past records doctor can also take certain decisions.
Patient can also give rating to doctor. It is and decentralized so no one can manipulate his rating. It is immutable.
Patient also can revoke his records from doctor.
Challenge during this task some of the ethereum methods which we can able to run in remix compiler but in actual production we can not deploy with web3.js. Like ABIEncorder error.
Also it takes more time to implement solidity and communicate backend with web3 so It Sacrificed the UI.
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