"But they can die?" Hermione asks, just to be certain. She isn't one for killing, but if it becomes a necessity, she'd rather know all about a potential opponent's weakness. After all, even Harry had had to kill in order to bring the war to a close.

"The taint may not be curable, but is it preventable? I don't know if anyone has been able to study them extensively, but perhaps a vaccine of sorts can be developed, in the event that anyone needs to travel somewhere they're known to frequent."