Dicer shakes her head, and her eyes flash with anger. Not at either of us, I suddenly realize, but at herself maybe. "It’s an antigenic shift, but it’s more than that, too. Let’s go back to the car analogy. It’s like the Jackrabbit suddenly changing into a Westwind instead of just changing its color and tag when the cops start getting too close. And then maybe into a city bus. And then a Merlin V/STOL. And then a suborbital. And then a fragging cruise-liner." She snorts. "That’s why I said it might have been contagious when your friend got it, but it’s not now. It can change that profoundly. It’s not precisely like anything I’ve ever seen. And there are even more disturbing characteristics ..."