I might have said it here before but I’m convinced that one of the big reasons that the public health information is so poor on covid is because the main thing that’s going to make workplaces safe is expensive ventilation installs/ overhauls, and if they start educating people on what the main risks indoors actually are, rather than preaching largely futile distancing and handwashing, that they’ll be condemning their big business mates to huge bills in order to actually protect workers.
The mantra when I did potentially dangerous work requiring risk assessments was that PPE should be a last resort to mitigate residual risk after all other non-PPE measures are taken. I think vaccines should be viewed as analogous to PPE here- same rationale…vaccines ‘fail’ (95% efficacy means 1:20 people are not protected, and perhaps wear off at a variable rate). You don’t want your respirator to fail in a room thick with toxic gas because fuck all else was done to protect you than stick a mask on you.