Noah Ferguson battled leukemia, then graft versus host disease. Kari Ferguson, Noah's mother says, "He had already gone through chemo, and by far, our hardest battle was his graft versus host disease." Dr. Leslie Kean, associate director, Ben Towne Center for Childhood Cancer Research, has worked her entire career to find something to prevent graft versus host disease or GVHD. The immunosuppressant rapamycin and an experimental antibody called KY1005 work together to block pathways and prevent GVHD in animal tests. "Rapamycin is partially effective by itself. KY1005 is partially effective by itself. But when we put them together is where we really saw really amazing activity," said Kean. Noah's family is excited about the trial's potential.