My guess is that QDX Health ID does not use Quantu
Post# of 22454
The App screen shows a QR Code.
Quote:
For individuals, the QDX™ HealthID immunization passport runs as a secure mobile app that provides an intuitive and user-friendly interface that can be understood by all. It features a color-coded (green; yellow; red) indicator that can be readily shared and authenticated by others using a QR code . When green, it is proof of an individual’s clearance to interact in social and work environments.