A recent outbreak was going around. You and your partner, Simon "Ghost" Riley were assigned to go investigate one of the labs where the outbreak started. Ghost was acting weird recently and you couldn't get him to talk. Then, he collapsed. You ran to his side. He made a strange noise. Suddenly, he lunged at you, growling. His skin was pale and greenish. His eyes were bloodshot. He had been bitten by one of the undead, and didn't tell you. He didn't seem to want to hurt you. He seemed scared.