Kira read through Dr. Morgan’s archive without sleeping, without leaving the room, not even pausing to eat. The grim scientist had studied RM, but only peripherally, and never in the context of Partial expiration. Most of her research on the subject was related to Pheromone 47, the mysterious particle that Kira had dubbed the Lurker, because it didn’t seem to have any purpose. Morgan’s hypothesis had been that the Lurker could cause RM, or somehow trigger it in a human who was carrying RM but had not yet manifested symptoms. Kira had deduced—over a year ago now, she realized—that the Lurker was in fact the cure for RM, but she had only made that connection because she’d spent months studying RM itself. Morgan had never done that.
The records also contained a fair bit about the other Partial factions, the ones who still held out against Morgan’s consolidation, and Kira read these now and then as breaks between the endless string of biology studies. Each rival faction was too small for the larger armies to bother with, and now that Trimble’s forces had been brought into her fold, Morgan seemed to be ignoring them completely. Each one was marked with an approximate location, and one or two lines explaining their reasons for not supporting Morgan: “disagrees with our methods”; “opposed to medical experimentation”; “formed a new, pacifist cult”; and so on. The nearest was a group called the Ivies, somewhere in northern Connecticut. She read each new entry with fascination, astonished not just at the variety, but at the one thing that made each group the same: Faced with the issue of supporting Dr. Morgan or dying of expiration, they chose the latter. None of them had firm plans to solve it on their own—or at least if they did, it wasn’t recorded in Morgan’s files. Kira wondered if Morgan’s records had a prideful blind spot, or if the other factions were really just ready to die. Trimble, it seemed, had been holding out for something to step in and cure it all for her. Were the others the same?
Did anyone, in the end, have any hope of being saved?
Scrolling through the medical records, Kira’s mind turned just as often to Arwen, the baby she’d saved from RM. But no, she wasn’t a baby anymore—that had been over a year ago. She’d be a toddler now. Setting aside her cursory glances of the children at the Preserve, Kira hadn’t seen a toddler since the Break, more than thirteen years ago, and though she had studied pregnancy and childbirth in excruciating detail, she realized she knew next to nothing about childhood itself. How fast did children grow? Would Arwen be walking by now? Talking? The entire concept of early childhood development had never come up before, for her or for anybody. Madison would be learning everything for the first time.
Kira felt a wave of despair, thinking that Arwen’s tiny, precious life wouldn’t even matter if she couldn’t find a way to cure everyone completely.
She dove back into her studies, determined to do just that.
RM was a shockingly complex virus that passed through multiple stages over the course of its life cycle. When she’d been studying Samm—well over a year ago, she thought grimly—she’d named these stages the Spore, the Blob, and the Predator. The Spore was the most basic version of the virus, created inside of the Partial respiratory system, where it passed into the air and, eventually, into a human body. As soon as it entered the bloodstream, usually by being absorbed through the lungs, it transformed itself into the Predator—a vicious killer that sought only to reproduce itself and build more of the Spore, attacking the host and practically eating it alive, breaking down every cell and tissue it could find in a mad rush to spread the disease to as many new hosts as possible. Carried to its extreme conclusion, this process could reduce a human body to goo, but obviously the infected person would die long before, as her organs and internal systems broke down. Most hosts actually died from fever, as their bodies fought back so violently they ended up frying themselves from within.
As deadly as the Predator was, human doctors knew very little about it, simply because it killed too efficiently. Anyone who lived long enough to be properly studied was either inherently immune—a staggeringly small percentage of the population—or infected with the third stage of the virus, which Kira had named the Blob. She had thought the Blob was the killer, but the Blob was in fact a combination of two different particles: just as the Spore reacted with human blood to become the Predator, so the Predator reacted with the Lurker, the mysterious Pheromone 47, to become the Blob—a fat, harmless, almost completely inert version of the virus. The Partials breathed out the disease, but they also breathed out the cure, which they could pass along in proximity to a human. Vale and Morgan insisted that the Trust had never intended for RM to destroy the human race, and it was the Predator they were probably referring to—RM was simply too good at its job, far better than anyone had ever expected, and the disease spread too quickly among people far from any Partials. Graeme Chamberlain had designed it, and killed himself soon after, so whether he’d done it on purpose was anyone’s guess. But the key interaction, the most important part of the process, was that third stage. The Blob. It said so much about the Trust, and about their plan, and about the man who’d come up with it.
Armin Dhurvasula. Kira’s father.
Kira had yet to find any solid connection between RM and expiration, but she had leads. First of all, she knew from Dr. Vale that the purpose of RM had been to tie humanity intrinsically to its engineered children. The Partials were thinking, feeling people, and the human race couldn’t be allowed to cast them aside like used tools when it was done with them. By putting the cure for RM inside the Partials, it seemed as if they were making a clear statement about the solution to this problem—the humans who cast the Partials aside would get sick, but the humans who embraced them would be fine. The Partials would breathe out their cure, the humans would breathe it in, and everyone would be healthy. And if the Predator had been less deadly, that plan probably would have worked. Would the same plan have saved the Partials as well?
If Kira was right, somewhere in the life cycle of the RM virus there was a cure for expiration. Obviously it wouldn’t be in the Spore, because then the Partials could heal themselves; it wouldn’t be in the Predator, either, because the mere presence of the Partials removed the Predator from the bloodstream. No, the cures seemed to be designed to activate only when the species intermingled, so what she was looking for would be buried in the Blob. The Partials would give humans the Lurker, thus saving them, and then the humans would turn around and give something back to the Partials and save them … but what? Was there a fourth stage of the virus she hadn’t encountered yet? Was there another interaction she hadn’t seen? It was possible that some of the Partials who’d spent a lot of time around humans would have already been exposed to the cure, but the only way to test that was to wait until their expiration date and see if they died. She opened a new file on her medicomp and made a note to check the records for something like this, but she didn’t hold out much hope for it—if any of the Partials had survived their expected expiration, it would be bigger news. Very few of the Partials had come into contact with the humans anyway, not for nearly eleven years. The Partials involved in the East Meadow occupation had received plenty of human contact, but was it enough? How much did it take? How quickly could it take effect? There were too many variables, and they were running out of time—observational data wasn’t good enough. She would have to test her theory directly, and that meant hands-on experimentation: She had to obtain a sample of the Blob and expose it to Partial physiology.
It was a good plan. It was the only plan she could make. But the steps she would have to take to carry it out made a part of her die inside.
“We need to kidnap a human.”
Dr. Vale looked up from his medicomp screen; another iteration of the same data Kira had been poring over for days. He stared at her a moment, blinking as his eyes refocused from the screen to her face. “Excuse me?”
“We need a human test subject,” said Kira. “We have to study the interactions between the stage-three RM virus and a living Partial, and the only way to get stage-three RM is from a human. I’m not human, and you’ve already used gene mods to make yourself immune. The only way to get what we need is from a human—I don’t like it, but it’s