Inspired by a mask discrimination thread it made me wonder what the legalities might be if the Governments of the world decided that you could only enter the country if you had, for example, a photo COVID-19 passport proving you had been vaccinated. Also, to extrapolate that out to giving individual businesses the right to refuse access to anyone not in possession of one.
AIBU - No that's discrimination
AINBU - Seems fair, many countries don't allow children into schools that haven't been vaccinated so it's the same on a bigger scale.