G6PD and G6PD deficiency: According to our prevalence study, most of the G6PD-deficient Senoi Orang Asli population had G6PD deficiency with enzyme activity less than 30% of AMM (9.8%, 36/369), while only 5.4% (20/369) of the subjects had intermediate deficiency with enzyme activity between 30% to 80% of AMM.