A further interesting phenomenon in the context of malaria potentially having implications for COVID-19 incidence rates is the global expression pattern of the Duffy antigen receptor for chemokines (DARC), which is well known as the cell surface receptor used by the malaria parasite Plasmodium vivax (Figure 4b,c,d) to invade red blood cells (RBCs). Here, ACKR1 is linked to malaria.