Changed jobs recently and a colleague was supposed to show me the process of doing something. The very first thing out of his mouth were begging me not to get vaccinated because it would kill me.
I harshly responded that I disagree with his position and that he shouldn't bring up that topic again. He very much tested the water if I would be an ally to his conspiracy nut views but shutting that down quickly spared me further incidents like this. Other colleagues who tried to just ignore his ramblings just received more and more of it.