When immune complexes formed by 5 μg/mL of purified mouse anti-Spike IgG (the concentration at which the highest infection level was observed in Raji cells) and SARS-CoVpp were added to FcγRII-expressing ST486 cells, all four transfectants expressing wild-type FcγRII forms (cf. FcγRIIA-H vs. FcγRIIA-R, and FcγRIIB1 vs. FcγRIIB2, corresponding to constructs 1, 5, 9, 10, respectively) were infected (Figure 5D), with FcγRIIA-expressing ST486 being more prone to infection than FcγRIIB (cf, constructs 1 and 5 with 9). This evidence concerns the gene FCGR2B and infection.