This is my answer now when people of authority over me are asking if I have had my vaccine yet.

I tell them I'm in the control group that is not taking it.

I tell them that If I die from COVID, it means I probably should have got the vaccine. If they die, it means they shouldn't have, and at least now there is a way to know the bottom-line effectiveness of the vaccine...

I've found this gives them pause and sounds just medical enough to confuse their tiny sheep mind. I also say it with a certain degree of certainty and relief in my voice, just to keep them thinking.