Finally, Vero E6 cells were transfected with either empty vector (Ctrl) or ApoD prior to infection with increasing concentrations of SARS-CoV-2 (MOI 0.005, 0.01, 0.05 and 0.1), with the extent of infection being determined by N protein immunofluorescence 24 and 48 h post-infection. This evidence concerns the gene APOD and infection.