a, SARS-CoV-2 titers in the human lung tissue of LoM administered EIDD-2801 (n=8) or vehicle (n=8) 24 h post virus exposure. b, SARS-CoV-2 titers in the human lung tissue of LoM administered EIDD-2801 (n=8) or vehicle (n=8) 48 h post virus exposure. c and d, SARS-CoV-2 titers in the human lung tissue of LoM administered EIDD-2801 (n=8 per experiment, yellow) or control vehicle (Ctrl, n=8 per experiment, blue) at 2 days post-exposure in two independent experiments shown c, separately and d, combined. e, Fold difference in SARS-CoV-2 titers in the human lung tissue of LoM relative to vehicle controls. f, H&E staining and g, immunohistochemical staining for virus nucleoprotein (positive cells, brown) of human lung tissue of LoM administered EIDD-2801 (n=8) or control vehicle (Ctrl, n=8) at 2 days post-exposure (scale bars, 100 um). a-d, Titers were compared with a two-tailed Mann-Whitney U test. Horizontal and vertical lines represent the median and interquartile range respectively. n= number of biologically independent lung tissues analyzed.