Ah, well, this is what I meant by 'stepping on someone's toes'... so, I guess I'll redo that part of the tree. Maybe that oh-so-popular yellow dinosaur can provide the vaccine portion of this.

Just looked it up, NOPE. Apparently he doesn't count as a dragon. Nature spirit (for some reason), Machine Empire (again, I dunno), and Virus Busters (meh, makes more sense than the other two)