For years, Adesayo Talabi , known online as Simply Sayo, thought her sister Elizabeth's medication and frequent check-ups were just part of everyday life, not the warning signs of a life-threatening blood disorder. But when doctors revealed her body stopped producing blood and she had only 2% of blood left in her body, she realised the silent killer living in her home. Sayo's parents had eight children, but only six are alive today. Two of her sisters died from sickle cell, one as a baby and