FCGR2A and infection: As shown in Figure 4, an anti-DENV E cross-reactive mAb, 4G2 (positive control), that recognizes an epitope common to the E protein flaviviruses, effectively caused ADE of ZIKV (Figure 4A) and DENV-2 (Figure 4B) infection in K562 cells that express the human FcγR, corroborating our previous observations [20,21,22].