I held the now empty vial in my hand, clutching it as Rob fell backward and shivered hard over the exam table. He started to make gurgling noises, white bubbles forming at his mouth and spilling off the side of his face. His glassy eyes started to roll back into his head.

“Claire?” Avery gasped in shock as she rushed over to stand beside me.

We watched as the thin wounds across Rob’s chest began to widen, a gush of blood spilling onto the white ...