G6PD and G6PD deficiency: Since G6PD deficiency is an X-chromosome linked disorder, G6PD level can be normal (G6PD enzyme level of more than 80%), or deficient (G6PD enzyme level of less than 30%), or an intermediate deficiency (G6PD enzyme level between 30% and 80%) among females whereas the G6PD level can be either normal or deficient among males [3].