At age 19, Amy Purdy contracted Neisseria meningitis, a form of bacterial meningitis. The disease affected her circulatory system when the infection led to septic shock; both of her legs had to be amputated below the knee, she lost both kidneys, and her spleen had to be removed.Sepsis is when an infection (any infection) causes an inflammatory response, leading to organ failure and/or clinical shock, and is a common cause of death. In Purdy's case, she went into septic shock in less than 24 hours of getting sick. Doctors gave Purdy only a 2% chance to survive since her sepsis was so advanced.Two years later, she received a kidney transplant from her father. Her friends now refer to her by the nickname Lucky