Vaccine passports security or segregation - What's Your Point?

Houston - A controversy is beginning to boil over the concept of the "vaccine passport" - or more simply - proof of inoculation.
It’s the kind of documentation cautious private companies may require before allowing employees to return to the pre-pandemic workplace.
Opponents say any "passport" requirement is discriminatory on its face and a violation of individual rights.
But supporters argue it's the safest route to fully re-open the economy.
Does anybody see a "slippery slope" here - in terms of precedent?