The health QR code is very interesting to me and I assume what you are referring to in terms of Americans not being comfortable. How does one receive a green QR code? And how would the US go about assigning something similar? The infrastructure seems impossible, especially given the fact that you would presumably need to be checked regularly to renew your green status. It's a good idea. I just am not sure how we'd go about it. But if China can do it with way more people, surely we can figure it out. Without getting political, I know the kind of person you might be referring to and am probably one myself. But I'd be 100% ok with it and don't see it as an invasion of privacy or stepping on my rights as long as it's done in the right way.