Killer T by Robert Muchamore

The narrative follows Harry, a British teenager new to Las Vegas, and Charlie, a science prodigy with a troubled past. Their lives intersect when Charlie is accused of creating explosives that injure a fellow student. As gene-editing becomes commonplace—allowing individuals to enhance physical and cognitive abilities—the darker side emerges. A synthetic virus named "Killer T," boasting a 90% mortality rate, is unleashed by terrorists demanding a hefty ransom for the antidote. Harry and Charlie navigate this transformed world, confronting ethical dilemmas and personal challenges.