A professor murders one of his students and brings her back to his lab. He cuts off all of her clothes and then he injects her with the serum. She returns to life and infects the professor, then breaks out of the building and begins infecting students when they try to help her (as she was stripped naked by the professor.)
A cook at a restaurant is bitten by the professor (who is infected.)
Soldiers encounter zombies, their newest member panics and falls to the ground. A second member of his team engages the zombie, but his M16A4 is knocked away before he can fire. He and the zombie engage in hand-to-hand combat. The zombie is killed, but is able to bite the soldier on the hand. He attempts to hide the injury, but is discovered and his arm is severed in an attempt to stem the infection. He transforms into a zombie despite the amputation, and bites the squad medic, before both are executed by Ellis.
Bart attempts to pose and have a picture taken with the dead naked woman corpse, and is bitten by a mosquito trapped in the room.
The two students who had allowed them into the confinement room are overrun and torn apart by zombies, and two agents escape while the zombies are feeding on the bodies.