In this unfortunate circumstance, the human becomes a ghost. Always give players a chance to touch the stake because being a ghost sucks. You cannot touch the weapons or affect the game in any way. You are out. You can reveal their location to the other players, etc.
Ghosts count off as both a human and a vampire.
There is no way to be un-ghosted short of starting a new game. The cross has two powers. The first is that vampires cannot approach it. They don't have to move back if you approach them with it, but they cannot move towards you. This applies to all vampires who are generally in front of you in your range of sight.