It became similar to the Mark of the Beast, in which you cannot not buy or sell, without it.
In this case, you couldn’t work without the “Mark of the COVID Vaccine.”
Now, those employers are all saying, “My Bad! Let’s just move along, now.”
A mark of willing compliance and conformity to the unassailable wisdom of the nebulous collective.. kind of like that all-important "democracy" that PINO keeps harping about.