Sickle cell disease (SCD) affects 3.2 million people globally and ~176 000 people die of SCD-related complications per year. 1 Nigeria alone has been estimated to have at least 150 000 newborns with SCD annually, a prevalence of 30 per 1000 live births has been reported in a regional newborn screening programme. 2 SCD is an autosomal recessive, genetic disorder in which red blood cells (RBCs) sickle in deoxygenated states due to single nucleotide polymorphism in which GTG is substituted for GAG (thymidine for adenine) at the sixth codon of the βglobin chain. This leads to chronic haemolysis, varying degrees of anaemia, and vaso-occlusive complications. 3,4 Despite a 10-fold rise in erythropoiesis, the haemolysis and resultant anaemia is only partially compensated, 3 can be exacerbated by factors related and unrelated to