Satellite map of the Gambia indicating the geographical origin of the samples included in this study. Sabaeus monkey samples collected from the different locations are detailed. Monkeys for which both PBMCs and plasma samples were available are depicted as vivid colors (red, females; blue, males); sabaeus monkeys from which only plasma samples were available are depicted as light, patterned colors (light red, females; light blue, males). Sex and age group coverage is illustrated.