Ideas for AI-powered covid immunity passports

Not sure if this is allowed or not, so I’ll just delete if it’s against the rules and mods ask me to. I’m an ML engineer with a covid immunity passport company, and I’m in a brainstorming phase, so thought I would come here for some ideas. Feel free to drop some if you have any!<br><br>I would like to know if people have ideas for products or features, as well as any general concerns about immunity passports. What do you all think about them?