Fig. 4From: Development of a screening platform to discover natural products active against SARS-CoV-2 infection using lung organoid modelsInfectivity tested using compounds of K-4 and M-4 (10 μM) against pseudotyped virus (PV) of SARS-CoV-2 Delta (A, B) or Omicron (C, D) variant with 10 μM dose of Lopinavir (E) as a positive control drug. Values indicate means ± SEM. (n = 3, *** p < 0.001, **** < 0.0001 vs. control group)Back to article page