Until they end up in hospital, isolated in a plastic tent, connected to a ventilator, and even loved ones are not allowed to comfort them. What a horrible lonely way to die.
And the fear of that happening to me is a lot less than the fear of adverse effects of an experimental injection.
Furthermore, you just don’t get it. If, and who knows when that might be, I decide that a “vaccine” is a good idea I can get one. You don’t have that option, you can’t undo your experimental injection.