G6PD and G6PD deficiency: By using the prevalence of G6PD deficiency detected in samples from males as a proxy for the cumulative allelic frequency of G6PD variants, it is possible to estimate the mean expected proportion of women with a heterozygous genotype in each country; in Thailand this would be on average 13.5%, in Lao PDR 14.9%, in Vietnam 16.3% and as high as 26.6% and 30.5% in Myanmar and Cambodia, respectively.