But then her parents put Emma through an experimental treatment at Children’s Hospital of Philadelphia.
They infected her with a version of HIV, reprogrammed to attack cancer cells.
Whitehead almost died, but the treatment worked and now she's in remission — and doing cartwheels all over her house.
Grady says the treatment hasn't worked for all patients.
It worked completely on three adults. Four treated adults have merely improved. A child relapsed. The treatment failed two adults completely.