/I'm by no means an expert about medical things but have done a ton of research and I think it's pretty accurate. Anyways, if anyone in an expert please don't be rude I tried my best! Enjoy!/
Bruce moved with efficiency for the next two hours.
The Shield med team was on their way, only half an hour out.
But they were still at a loss.
Routine blood tests came back murky and showed only the fact that she was deteriorating quickly.
The display of the monitors was hardly reassuring, with her blood pressure dropping constantly, and her heart rate erratic.
But she was alive. They had time. Not a lot of time, but some.
Bucky and Steve had come home from their run only minutes after Natasha had been taken to the lab.
They'd entered the kitchen to find broken glass and blood across the floor.
They'd followed the trail, Steve with his shield, Bucky with his gun.
Once at the lab, Steve had stopped for a moment before pushing the doors open.
"Talia-" Bucky had choked out, taking a step towards the bed.
"What happened?" Steve had demanded and Bruce had only shook his head.
"We don't know."
That's still where they were at, scattered around the tower, searching for something, anything.
Clint had torn their room apart, had collected everything she'd drank from and worn for the last two weeks.
Bucky and Steve had taken the kitchen, pulling her snacks and food from the shelves and placing them all in a box.
Tony was in the second lab, testing every single thing they brought him under the microscope.
Bruce had carefully examined nearly every part of Natasha's body, expecting to find some sort of lesion or cut or needle mark.
Anything that would explain this.
He wasn't sure it had been anything external, that it was poison or anything like that.
But this wasn't any normal illness, it couldn't be.
Something told Bruce this had been an attempt on Natasha's life, and he had to listen to that.
But still the tests came back clear, nothing in the drinks or the food, nothing in her room, nothing on her clothes.
Tony's voice came over the intercom. "Med team is landing, will be there in five. We still haven't found anything, Bruce, any other ideas?"
The man exhaled and shook his head. "We'll need to send someone to the academy, search her locker and the gym. Shut it down, just in case."
The others would be listening too. "Bucky, Steve, search the rest of the tower. Clint, come here."
Bruce turned back to Natasha, going through the motions of checking her vitals again.
Her fever had skyrocketed, and he added more meds to the IV.
Hopefully if nothing else, they could bring her fever down.
His hand brushed her hair from her face and he cursed.
The numbers didn't show the heat coming off her or the dry, red skin as he brushed her hair back.
He sighed and checked on the breathing tube, glancing back as Clint came in.
"Why did you need me?" The archer asked quietly, looking wrecked.
"Clint," Bruce said carefully, "I'm sure we will figure this out. But I think she needs you here more than she needs you tearing the place apart."
Clint dragged his fingers through his hair, nodding. "Yeah. Okay."
He pulled out the chair beside the bed and sat, taking her hand and pressing a kiss to it.
"I love you, Nat." He said quietly, voice shaking just a little.
They'd had their fair share of moments like this. But none quite as helpless.
Bruce moved to the corner to give them some space, as he double checked the blood results.
He heard Clint before he heard Natasha.
"Bruce-" a choked cry of his name.
Bruce turned, heart dropping as he rushed over.
Natasha was seizing, body arching off the bed and slamming down, her hands curled in front of her chest.
A grating noise sounded and Bruce pulled her onto her side. "Hold her." He told Clint, his own fingers nearly in her mouth as he held the breathing tube in place.
Pink foam bubbled at her lips as her body continued the agonizing jerking movements.
The medics had arrived, but they were certainly not in charge.
"Get me diazepam, now." Bruce demanded, helping Clint brace her on her side.
It was too long. It was going on too long.
"You." Bruce nodded his head at the medic closest to the door, "Tony is in the other lab. Get him. Tell him we need a brain scan. Go!" He growled, eyes flashing green.
The medic stumbled and nodded, eyes wide as he rushed from the room.
One of the team came forward, quickly sliding the needle into the flesh of her thigh.
As the seizure neared dangerously long levels, Natasha began to still.
Bruce exhaled, heart pounding as he rolled her onto her back and watched the monitors.
Her blood pressure had plummeted again.
But the chest drain had barely collected anything, so it wouldn't be down to internal bleeding.
On instinct, Bruce pulled back the lids of Natasha's eyes.
Bloodshot.
He tilted her head to the side, pulling her hair from her ear, cursing.
As he touched her ear, his fingers came back wet.
They were officially out of time for speculation and guesses.
They needed answers now.
Because there was fluid around her brain, and she was dying right in front of them.
They had less than a day.