"Isaac. Look closer at their teeth." She said as she knelt down by one of the corpses. She lifted its head, which allowed Isaac to see the regularly sized massive sharp teeth. "Isaac, these aren't zombies. They're vampires. Diminished, hungry, hive mind like vampires. The only thing that's driving them crazy is their thirst for blood. They don't eat organs, they try to get into the bloodstream. I'm guessing what you are seeing with your cells is just...the infection that's causing that thirst."