The seemingly miraculous recovery of little Hannah Day who rebounded earlier this month after a rare bone marrow transplant cancer free for 60 days has suffered a major setback.

Mother Brooke Ervin said her stem cells, which were transplanted into her daughter on March 19, are attacking her four-year-old daughters body from the inside out, manifesting in a rash and third-degree-like burns.

She has burns to 90 per cent of her body and is now admitted back to [B.C. Childrens] hospital in hopes they can stop it.

Hannah is in immeasurable pain as her family watches, terrified and helpless, Ervin said Wednesday.

Hannah is not responding to oral antibiotics, and steroids being pumped into her body to stop the burning are suppressing her immune system, which is needed to fight off the cancer.

This is such a horrible life she got, a distraught Ervin said.

She has spent most of her life suffering just to stay alive. No one should have to fight so hard, especially an innocent child.

She wants to live so bad and she shows us every day with her fight and will to live, Ervin said. She wont give up and we cant either. We have to hold strong in the hopes one day this will end.

On May 6, Hannah was discharged from hospital in Vancouver after receiving stem cells from her mother in a haploidentical transplant.

Although only a half match, doctors hope Hannahs cells will recognize her moms cells which once protected her in the womb and allow them to kill off cancer cells in Hannahs body.

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After cancer rebound, Victoria's little Hannah Day back into life of pain as transplanted stem cells attack her body