"In the mid-1990s, Bradbury accidentally hit his leg while chopping firewood. Gangrene set in, and his right leg was amputated below the knee. It spread to his left leg, and part of his left foot was amputated, leaving him in a wheelchair. The disease eventually proved fatal, and he died on August 20, 1997."

That doesn't make sense, How come no aggressive antibiotic therapy and how did it jump from one leg to another.