I don’t know what you think about proof of vaccine (and I hope you won’t feel the need to tell me), but the Bible reveals that God also has a “proof of” requirement—and no one is going to pass legislation that will force him to drop it. You can try to forge a “proof of” card, but it won’t work. Not that there haven’t been forgers – there have been many – and they might fool me, but they will not fool God.