Five weeks later, after the recovered patient was gone, KPC was in the respiratory culture and they didn't know how it was spreading or how to treat it. To prevent it from spreading further in the hospital, the hospital put up signs reminding people to wash their hands, equipped robotic clean rooms, transferred all KCP patients to an isolated intensive care unit and built a wall to separate them even more. They eventually realized that the bacteria were transmitted by silent carriers, people who don't know they have the bacteria. This was discovered through DNA sequencing. Six months after the arrival of patient one, the epidemic was finally over, but it had infected eighteen people and left six