<p>Absolute frequencies of Duffy blood group system expression and its isoforms and G6PD expression in our cohort from Mauritania.</p>

Duffy blood group system expression and its isoforms were determined based on known polymorphic positions on ACKR1 gene and its promoter (Table 1). G6PD expression (g6pd +) and deficiency (g6pd -) were published in our earlier works [33,40] and based on the 2024 WHO classification [96]. X-linked G6PD deficiency cannot be genotypically determined in heterozygous females due to random X chromosome inactivation. Absolute frequencies were calculated as a function of the sex (F: female, M: male) and ethnic groups: Black Moors (BM), White Moors (WM), Pular (PL), Wolof (WF) and Soninke (SNK). NA refers to an absence of genotyping. (XLSX)