Jack Miller was born in Zelenogorsk. He has little past experiences defining him except for being hospitalized for appendicitis and wanting to become a doctor after the event. Upon graduating high school Jack went into medical school and became a nurse practitioner so he could gain first-hand knowledge of being a doctor. During his apprenticeship, the outbreak occurred. He was at the hospital when it happened and rushed home to his parents to see if they were okay. They were amongst the dead. There was not time for grief however, an apocalypse was coming, he had to be ready.