Funny story.... Since he sort of is infected. As a result of drinking their blood. Which is even worse than there being tainted blood in the first place. There are some parts of being a Warden that are kept secret for very good reason.

On the plus side, being accused of being a human taint-carrying plague rat isn't even the worst thing someone has said to him this week, so Alistair just shakes his head, clearly amused. "No, no personal experience here. I'm immune." In a manner of speaking. But he's not infectious at least. Rather more seriously he goes on, "I have seen it happen though. And it's not pretty." Much like the darkspawn themselves.

Speaking of which, his attention is dragged away down another tunnel and he stands there a moment, staring down it and frowning faintly before turning back to Zelena. "There's more nearby. We should move, unless you're really in the mood for some exercise." Who knows, maybe she enjoys turning ugly, tainted monsters into slightly less ugly possibly still tainted monsters.