Extended Data Fig. 6: Pathological scores of lung sections.
From: Fluorogenic reporter enables identification of compounds that inhibit SARS-CoV-2

The semi-quantitative method is described in the methods. For the histology slides, we selected two representative mice out of the 6 mice based on the plaque assay data (Fig. 7B). The dotted black line represents pathology score = 0. Data are mean ± s.d. N = 2 independent animals for each treatment group. 3 slides per animal were examined. P value, two-sided non-paired t-test between treated and vehicle groups. ****p < 0.0001. Exact P values: bruceine A 1.4E-07, gamabufotalin 2.8E-07.