Hannah Warren spent the first two years of her life in the intensive care unit . A month after her windpipe transplant , the toddler is mostly breathing on her own . The surgery , pioneered by Dr. Paolo Macchiarini , director of the Advanced Center for Translational Regenerative Medicine at the Karolinska Institute in Stockholm , was only the sixth performed in the world , and Hannah was the youngest patient and first to receive the transplant in the United States . Hide Caption 2 of 7 Photos:Photos: The miracle baby
Hannah Warren spent the first two years of her life in the intensive care unit . A month after her windpipe transplant , the toddler is mostly breathing on her own . Hide Caption 2 of 7 Photos:Photos: The miracle baby