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Erin needs groundbreaking treatment in America. Her family have just eight weeks to reach their one hundred thousand pound total.
Erin's mum Sarah Cross has been telling Heart she couldn't believe it when the doctors at Alder Hey Children's Hospital in Liverpool told her that her little girl Erin was facing another fight with Leukaemia.
Erin had been given the all clear and had started school last September. Days before her diagnosis she had been full of life, even swimming once a week. Then following a routine blood test her parents Sarah and Anthony were given the devastating news. They hoped it was just a blip, but further tests confirmed their fears.
Last time Erin had been diagnosed she had been in and out of the GP's surgery with various illnesses. This time however there had been no warning, with Erin just having a bit of a cough.
Erin is now back under the care of specialists at Alder Hey. Her parents had hoped chemotherapy would beat the cancer however they've been told a Bone Marrow transplant will be needed.
Ground breaking treatment does exist, however it'll cost one hundred thousand pounds and will take place in America. The trials begin in eight weeks time.
The Cross family are now doing all they can to raise the funds to send Erin to the U.S. Sarah tells Heart 'When I think about it in the morning my stomach is churning but we just have to pull ourselves together for Erin'
You can find out more about Erin's story on their Facebook page