Sickle cell disease denotes all entities associated with sickling of Hb and is categorized into the homozygous form Haemoglobin SS (HbSS) also known as sickle cell anaemia (SCA) and the compound heterozygous forms such as Haemoglobin SC (HbSC) and Haemoglobin S/Beta-thalassemia (HbSβ) [3]. Here, GSTM1 is linked to sickle cell disease.