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Facebook: Rare donor found for Leukemia patient

Twenty-two-month-old Iona Stratton had been fighting infant acute lymphoblastic leukemia since soon after her birth, but because of her half-Chinese, half-English background, her family couldn't find a bone marrow donor to match her rare type. In October 2008, after her parents made an appeal on Facebook, more than 5,500 people around the world signed up and, eventually, a match was found in Australia. Tragically, two weeks after the operation, the toddler died due to complications.