As part of a hiring process recently, my hubs disclosed his medical marijuana use. He was told repeatedly, during multiple interviews, that his it would not be problematic at all. They gave him a job offer, had him come in and fill out all the new-hire paperwork, and take a drug test ("Oh, it's just a formality, it doesn't mean anything."). Then they rescinded the offer because he tested positive for marijuana use. I was livid, but he was just, "Eh, they wasted their own money."
Back on the topic-ish: I'm not sure if I'd trust a COVID vaccine that has been fast tracked with less rigorous testing and trials than vaccines usually get. Especially knowing that even doctors seem less-than-confident in its efficacy and/or safety. I would be surprised if a large chunk of the population didn't have a similar stance. And imagine what would happen if it is less effective than advertised or have to recall it--anti-vaxxers would have a field day.