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.
If you don't feel like saying no yet, you can always claim allergy to polyethylene glycol (Poly-Eth-el-eeen gly-call), as this allergen is present in all "vaccines"
I'm using that too. Nice!