Hello to any of you comming over from Luminesyra's Generator Rex Fanfic Arrow of Trust, to any of you who aren't from that side of fanfiction, I recommend it. It's a treat.

The first month of survival was a struggle.
The second month they took back the school.
The third month Ema finally got to start research in her strong suit, vaccinology.
The tenth month she screwed up royally.
"Look Ema I know you're pretty good at this stuff and all but are you sure you want to do this?" Salem sat on one of the lab tables staring skeptically at the cheap needle in Ema's hand.
Ema poked her thumb with the needle, "Look the rats are totally in control even after being injected with the real deal, I need to move up a notch."
"Humans are more than a couple notches up from rats Ema." Salem's eyes read with pure frustration, "Why not move up to cats or monkeys or something."
"The immune system of a cat is different from that of a human and I don't have access to monkeys. Really I'd love to get ahold of some ferrets or pigs or something but as it stands I don't have closer animals to model against the human immune system." Ema shrugged, "It's a necessary risk."
"You couldn't just grab some random person off the street?"
"Because it would go against my hypocratic oath. Self experimentation is of lesser concern."
The other girl sighed, "What am I here for again?"
"To keep my notes safe and shoot me in the event things go south and I try to eat your brain." Ema poked he needle into her forearm, "I've implemented a specialized enzyme to create a more immediate effect. If you have any questions ask now."
"What are the chances of this working as planned?"
Ema thought on that, "10 to 1, 35.684912 to one factoring in my bad luck." She pushed the end to inject the experimental vaccine. "But that is irrelevant."
Fifteen minutes in, nothing happened.
At forty-five minutes she could feel pain starting to radiate from the injection site, Salem caught her when she collapsed. They always took her notes by way of video because her hand writing was too difficult to read.
Two hours in she was in too much pain to vocalize clearly. Salem set the camera on the counter and left the room.
Three hours, everything was shifting, adapting. She'd really screwed up this time. At least she was going down for science?
Three hours and fifty minutes, the pain was receding, she could think clearly, everything looked a little too bright.
Four and a half hours, she could speak again.
Five hours. She stopped the camera and slumped into the single desk in the room, pulling out a mirror from where the teacher had left it. Left bottom drawer.
She was blessedly not suffering from any of the epidermal maladies or blatant deformities she'd come to expect. She had the same round freckled face, the same long blue and blonde streaked hair, and the same pitifully small build. Unfortunately not everything was the same, the pupils of her pretty blue eyes were enlarged, allowing in more light than was normal, and when the light hit them just so they shined like the eyes of a dog. They were surrounded by thin, red scratches where she'd clawed at them. Her mouth was even more bizzare though, her canines and the two teeth behind them had been replaced by half inch incisors clearly meant to tear things apart. Everything about her had gained a distinctly predatory feel that set her entirely on edge.
It fascinated her.
"What the hell sort of Zack did I just shoot myself up with?" She went to get her needle from where she left it on the table and scanned the label, "Freddy…. Urgh it was one of the nasty claw ones." She glanced to her hands, her nails were elongated and thicker than she remembered with edges like knives but nothing on the grotesque level of the zombie whose blood she'd taken to create a vaccine. It failed to explain some things though; her Zs didn't have the specialized eyes she had, or the fancy teeth. She could guess at the origins of some attributes but it was bizzare what she'd ended up with.
She set it on her desk with the camera, after over five hours of misery and a morning of double checking her research, all she wanted was sleep.
With reasonable caution she headed to the door and knocked, "Salem? You still out there?"
There was a pause, "Ema?"
Definitely Salem on the other side, Ema could recognize that voice in a heartbeat, "Nah, it's the Easter Bunny."
"You still… You?"
"I find that to be an illogical line of questioning firstly on the reasoning that we have no reason to believe our infected friends can speak and secondly on the reasoning that regardless of whether I was one of them I would still be 'Me' but yes. I remain mentally unaffected, I should like to conduct a few more months of waiting however, some alterations have been made by the virus and I should like to be certain they don't come to affect my behavior."
"Let you out?"
"Yes, but lock my room from the outside when we get there."
The door came open and the two girls crashed into eachother, both grinning wildly.
"Don't you ever do that again dumbass. You sounded like you were dying in there." Salem was laughing.
"I felt like I was dying." Ema pulled away, "Got some cool new enhancements if it's not volatile though."
She exposed her sharpened teeth for Salem to see, "If all is well and it also functions as immunity then we may have to gather a couple more human subjects. This, the nails and the alterations to the eyes including the fact that I can detect significantly more in the way of smell than before which hints towards heightened olfactory senses, and a few other clues suggesting heightened hearing and a lessened sense of touch. Yes this could prove to be beneficial as a modification for sentries or close combat soldiers."
Salem ruffled the smaller girl's blue streaked hair, "We'll take this one step at a time, figure out your mental state then worry about the other side effects."
"It's a vaccine, it has symptoms not side effects."
Salem shrugged, "Same to me, I'm calling them Side Effects though, has more of a ring to it."
Ema sighed, "Whatever you say. I'm heading off to sleep."
"Let you out in the morning?"
"Please."
"Good night Side Effects."
"That's not accura-" She stopped herself, laughing a little, "Alright fine then. Good night Pyra."