I have this bit of easily faked paper that shows when I was vaccinated. I don't think I was forced to get it, except perhaps if I chose to do X or Y.
Some employees were forced if they wanted to keep their job.
I dimly recall MAYBE I had to show the bit of paper for casual inspection twice, maybe three times, in order to do "X". Aside from that, neither of us had any real reaction to the vaccine, fortunately, beyond being tired a bit. "Stuff" does happen, at times, and folks maybe blame it on the vaccine when it had other causes, but "we" do know the vaccine did induce some reactions in people, mostly younger males.