She shakes her head. "Hell, you could even wait years, couldn’t you? Then, when you’re ready, you hit the group with the spell—some area-effect thing, probably—and that’s it. Okay, sure, important people—the people who go around with serious astral security—aren’t going to get sick, because the spell won’t get to the bugs. But what percentage of the population is that? Pretty small, I’d say.