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Calculation of the half maximal inhibitory concentration (IC50) of licorice and glycyrrhizin on SARS-CoV-2 plaque forming efficiency. The IC50, log (IC50), and R squared (R2) for each compound under each treatment protocol are shown. Details about treatment protocols (A–C) are found in Section 3.5.4. (the effect of licorice and glycyrrhizin on viral induced cytopathic effect (CPE) and viral plaque forming efficiency (PFE)).
