He does often forget the whole 'caring for one's self' part, usually too preoccupied with defending others.

Kain nods grimly when she mentions that, knowing that it's entirely important for him to have someone there who can... deal with him if he ever does end up infected.

"I hope it truly doesn't come to that, but I promise you. I'll seek you out should I become tainted by it. I don't want to risk anyone else's life. I won't harm Inessa. I... I didn't cause her harm, did I? In what you saw?"