Race Against Time For The Little Boy Zac Who Is The Only Child In Britain Suffering From Rare Disease Gets Help From Simon Cowell

9. Extremely Rare

“Only 0.5 percent of children diagnosed with leukemia suffer from Near Haploid,” Hannah told. “We haven’t found another sufferer in this country, but there are two in America.” The only chance for Zac’s survival was a bone marrow infusion.