I really don't like the approach. It's one thing suggesting that indoor hospitality or big events may require mandatory vaccination or recent supervised test. I can see the argument for it in the health and social care areas as well. I think it gets less defensible as the compulsion level expands (especially without testing as an alternative)The Italian PM doesn't rule out making vaccination mandatory for everyone, which would be a big step:
https://www.thelocal.it/20210903/th...xpand-its-covid-vaccination-campaign/?order=0
What do people even mean by it? No access to schools? Public transport? Supermarkets? Hospitals?
The mental model most of us carry of the unvaxxed (by choice) is the rabid antivaxxer Trumpite trying to sell snake oil and his unlucky entourage who got caught up in the misleading headlines and outright lies.
Unfortunately, in the UK at least it's likely to mean people living in the more deprived areas. It's more likely to mean ethnic minorities. More likely to mean people already disadvantaged, or already alienated from the society around them.
And that's before I start on international travel and conflicting approaches from different countries. The UK aren't currently vaccinating the 12-15s, they only plan to give one dose to the 16/17 group. Germany would view them all as unvaxxed adults - needing to quarantine, even as their younger siblings are ok to travel and their elders can get vaxxed as per requirement.
Other countries are making a third booster dose within 9 months mandatory for travelers. Not all countries will be offering that option.
Some countries only do a single vac dose for those with recent +ve PCR tests - as that looks to be as good or better protection than two vaccine doses. That pattern wouldn't be acceptable in the UK though.
All of them following the science, all of them with different answers to similar questions.
TLDR - vaccine passports are not easy fixes.