This could be extended to having a total Health Passport outlining every medical problem you have and then deciding whether you can even travel anywhere or not.
That should concern all of us, that this is the tip of the iceberg. This could well evolve into a total overall Health Passport, not just for covid but for every other medical condition.
This could also evolve into something akin to China’s “Social Credit Score”, which would then get into one’s social/political activities being reviewed as a condition of being allowed to travel and go to ballgames and such.