Imagine the costs of a vaccine that would make you immortal in the US? Surely not everyone would be able to afford it. But then we could implement an immortality lottery, to give everyone a shot. That could be the devious slogan: “everyone gets a shot”. Devious because not everyone does, of course. If you win you get the vaccine and live forever, but your friends and family aren’t included.
Why not? Surely that would depend on how much it costs to make, maybe it would be cheap as chips?
Oh, I see you completely subscribe to the customer theory of value, where price is dictated by "how much is it worth to the client?"
In that case it would have to be a subscribtion. Or, once you get the shot, the company ownes you. Come to this of it, the two situations are actually the same.