health_cards (rubygems): Health Cards implements SMART Health Cards, a secure and decentralized framework that allows  people to prove their vaccination status or medical test results. It is based off of W3C  Verifiable Credentials and FHIR R4 health data exchange standards. It allows conversion of  clinical data into JWS which may then be embedded into QR codes, exported to smart-health-card  files, or returned by a $health-card-issue FHIR operation. 
Keywords: fhir|health-cards