The 2018 Nigerian National Demographic Health Survey of 11,243 children of ages 6–39 months found prevalence rates of 77.8% HbAA, 19.9% Hb AS, 0.9% Hb SS, 1.4 HbAC, 0.3% Hb SC, 0.1% Other genotypes, which include HbA/Betathalassaemia and HbA/Beta+thalassaemia genotypes [13]. Here, GSTM1 is linked to beta thalassemia.