Just two weeks ago, doctors at Boston Children’s Hospital did not know if Hannah Swift would live through the night. The 11-year-old’s liver was failing, and she needed a new one immediately.

Doctors did not know why her liver failed, but they quickly placed her on a transplant list and tested family members to see if any were a match to be a living donor. Her father was, but preparing him for the surgery would take too long and Hannah was dying.