Hannah Warren, a toddler who became the youngest person ever to receive a bioengineered organ, has died, surgeons involved in her treatment said. The girl, who was born without a trachea, died on Saturday. She would have turned three in August. The initial operation to implant the bioengineered windpipe had also evolved surgery on the girl’s esophagus, which never healed properly. A pediatric surgeon says she underwent another operation a month ago to correct the problem and died from the complications that arose.