A: G6PD deficiency is a very common inherited condition, affecting over 400 million people worldwide. It is more prevalent in those of African, Asian or Mediterranean decent; this could be because this condition conveys some protection against malaria infections, which occur mostly in tropical climates. G6PD deficiency is due to a genetic defect of the X chromosome; there are over 300 variants of this condition. Since men have XY sex chromosomes and women XX, [...]