I don't know what harmful effects the vaccine may have, but I do know that my risk of dying from Covid is pretty much nonexistent (I already have naturally acquired immunity), and that I or my survivors can't sue pharma companies if the vaccine causes serious adverse effects.

I have some mild concerns about what happens if the body starts trying to bind to the wrong end of the spike protein, or that missense proteins might be produced, either through regular transciption errors, or poor quality control.

So I'm perfectly content to let others take the stuff. Not me or my immediate family. The risk/benefit might be worth it for the grandparents, though