Fig. 7
From: Coffee as a dietary strategy to prevent SARS-CoV-2 infection
Serum from drinking coffee samples has an inhibitory effect against SARS-CoV-2 variants. a Flow chart of collecting serum within 24 h. in coffee-drinking subjects. b Detection of inhibitory efficacy of the serum with control group (H2O), low dose of coffee (1 cup), and high dose of coffee (2 cups) against wild-type SARS-CoV-2 by Vpp. c The inhibiting capability of the serum in drinking coffee with different concentrations against the Omicron variant was assessed by Vpp. d Efficacy against the Omicron variant of the serum with a low dose of decaffeinated coffee (1 cup), and a high dose of decaffeinated coffee (2 cups) was tested by Vpp. e Vpp assay examined that serum reveals the ability to inhibit the SARS-CoV-2 Omicron variant infection within 6 h. after drinking coffee. SARS-CoV-2 Vpp assay (MOI = 0.1). Analysis of variance (ANOVA) was performed for statistical analyses. Statistical significance was concerned as *P < 0.05, **P < 0.01 or ***, P < 0.001