Figure 3.

Infection preventive (antiviral) effect of EF on pretreated human airway epithelial cells. EF prevented OC43 (A) and SARS-CoV-2 (HU-1, (B,C)) infection dose-dependently in pretreated HNEpC and HBEpC. Cells were pretreated with EF for 24 h and infected with virus at MOI of 1. Viral titer was measured at 72 h pi. Data resulted from 3 independent experiments. One-way ANOVA with Bonferroni multiple comparison correction was performed (****: p ≤ 0.0001).