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Yes, blockchains can indeed be leveraged to secure health data storage as decentralization introduces an efficient way of protecting precious medical records! Health data is extremely personal and confidential, so GDPR/HIPAA compliance-based cyptography networks held on with strict permissiions can definitely enhance the security needed for success thus promoting privacy.

Tailoring it such that patient has total control as to who gets access and knowning their Qr code secures them a unique victim (thus regaining further trust into healthcare attendance) , this has various benefits mainly failure resistance due to multiple node hosts across the globe storing copies of your encrypted health info.

Thanks for the awesome question inspiring this arousing response!