It's sad to hear people with reactions to Covid jabs. Sadly, the vaccinations are the best defence we have and the only way we can reopen without 1000s of deaths so it must be a bit of bugger when they don't work well for people. Luckily my own reaction to the vaccination was mild, but I'm glad I had the jab (unlike several I know who managed to catch Covid and die before vaccinations became available).
Personally I think the passport thing I have here in Italy (which shows I am vaccinated, cured, or have a recent negative test) is wonderful as it means I can sit in a restaurant without risking sitting next to a no-mask, no vax, no testing person who may well infect me (albeit temporarily, as I'm hopefully immune, having had both Moderna shots) and put me and my family at risk. I see it much like having a driving licence (which I currently don't have as the Italian state won't let me use my UK one). I can see how badly implemented schemes will cause trouble, however.
What is even sadder, is that a number of people (shall we say a very significant minority?) are refusing the vaccination out of fear or to make a political point even when they are lucky enough to live in countries that would be able to give it to them. Unfortunately their choice to use their civil liberty to remain unvaccinated reduces other people's civil liberties very much (for example townfanjon who has good reason not to want a booster and who may find himself at risk or having to isolate/refuse work in order to remain safe if others don't vaccinate).