I am very proud of the verifiable credentials we made for Covid. Those QR Codes were the first time in the history of digital health that medical information was transferred from provider to provider through the patient and not some massive corporation or governments. The patient decides who could see it when the patient shows it to whoever he/she wants. The data is fully stored in the QR as a W3C Verifiable Credential with DID keys. Nothing is more decentralizing than that. And it's so private that most QR codes were actually printed instead of stored electronically.

In every other implementation of health information, that transfer happens either through massive corporations, like in the US, or through governments like in Brazil, India and Canada. In health care, you have absolutely no control over your data. You don't even know who has it and how many times it was used. Our "little experiment" generated 5B QR codes and neither governments, nor the usual corporations have idea who, when or what scanned them.

It was a massive win for the decentralization of health records.