I think a mark on one’s forehead would be a lot easier to allow folks to move around, buy and sell, etc.
LOL to the max! Those who receive the vax will be given a mark that tells people they are safe and immune. No need for them to wear a mask or socially distance. Those with the same mark will be able to party, attend sports games, go to movies, get a massage, dance close with strangers and work out in a gym without a mask. The rest can lay on the couch, clutching pearls, and crazy as a bed bug.
Confirmation that you have taken Moderna Vaccine 666.