The Quansys 5-Plex (AGP, CRP, ferritin, RBP and sTfR) and 7-Plex (2017) assay also concurrently measures five or seven analytes: AGP, CRP, ferritin, RBP, sTfR, histidine-rich protein II (HRP2; produced by malaria-causing Plasmodium falciparum parasites) and thyroglobulin in a single sample aliquot (10 μl). This evidence concerns the gene RBP4 and malaria.