This idea was floated & denounced by WHO... that people who have already recovered from covid could be allowed to resume normal life on theory they were least likely to pass it on in future. WHO objected to the idea partly on human rights grounds, the idea of having 1st & 2nd class citizens.
I wonder if any countries will try the idea, though, as official part of their virus controls. To try to coerce vaccinations -- and could a country even take that to the point of insisting on verifying antibodies before the 1st class citizen status was conferred. Plus the covid vaccine may be an annual jab required; what if people have to pay for their annual jab to keep/get the 1st class citizen status, but some can't afford it?
Who thinks I'm talking rubbish & who thinks some country might create such controls?