(A) Huh7.5 cells were exposed to SARS-CoV-2 pseudovirus directly or after pre-treatment with different concentrations (0.0001, 0.001, 0.1, 0.5, 1, 5, 50, 100, 250 IU/mL) of UF heparin or LMWH enoxaparin for 30 min at 37°C. Infection was determined by luciferase reporter activity after 5 days. Data information: Data show the mean values and error bars are the SEM. Statistical analysis was performed using (A) ordinary one-way ANOVA with Dunnett's multiple-comparison test. *P≤0.05, **P≤0.01, ***P≤0.001, ****P≤0.0001 (n=3 donors measured in triplicate). 