ACKR1 and malaria: The misconception that P. vivax is absent from sub-Saharan Africa stems from the “Duffy-malaria hypothesis:” most individuals of black African origin are resistant to P. vivax infection due to the absence of the Duffy antigen, also known as the “Duffy antigen receptor for chemokines” (DARC), on the surface of erythrocytes [11,12].