The WHO recommends PQ for radical cure of P. vivax or Plasmodium ovale malaria in all malaria transmission settings in children and adults except pregnant women, infants younger than 6 months, women breastfeeding infants younger than 6 months, and women breastfeeding older infants with unknown glucose-6-phosphate dehydrogenase (G6PD) status.1 Here, G6PD is linked to malaria.