BPR1P0034 reduced influenza virus production. MDCK cells were infected with influenza virus A at 50 PFU/well. Different concentrations of BPR1P0034 were added at the stages of viral adsorption and postinfection. (A) The effect of BPR1P0034 on viral plaque formation. (B) Quantification of viral plaques treated with serial dilutions of BPR1P0034. This is a representative result of two independent experiments. The y-axis represents percentage of plaque reduction compared with the virus alone control, set as 100%.