ACKR3 and infection: In this study we show that LMP-1 and CXCR7 mRNAs are differentially induced by type 1 and type 2 EBV during the early stages of infection of primary B cells with recombinant EBV viruses, consistent with differential induction of these genes being the basis for the weaker ability of type 2 EBV strains to transform primary B cells.