G6PD and Schnyder corneal dystrophy: Of the sub-categories of HHA assessed in 2000 (i.e., G6PD, SCD, thalassemias) in the WHO Africa Region (Table 3), age-standardized death rate for G6PD was 20.06 (95% UI 13.57 – 34.32), SCD caused.55 deaths (95% UI 0.33 – 1.03) and thalassemias was.28 (95% UI 0.19 – 0.41), per 100,000 population.