Fig. 1

Experimental grouping and treatment. Group A. After the cell adherent grew to 70%, the maintenance medium was changed and continued for 24 h, 36 h and 48 h. Group C. 0.250 mg·mL-1 chlorogenic acid was prepared with maintenance medium as solvent, 100 μL was added to each well for 1 h and aspirated, Hanks solution was rinsed twice, and 100 μL of maintenance medium was added to continue to culture for 24 h, 36 h and 48 h. Group D. 100 μL of DPV virus solution diluted in maintenance medium was added for DEF 1 h and aspirated. Hanks was rinsed twice and then added to the maintenance medium for 24 h, 36 h and 48 h. Group F. DEF was aspirated with 0.250 mg·mL-1 chlorogenic acid for 1 h, Hanks was rinsed twice and inoculated with DPV for 1 h, and Hanks was rinsed twice and then the maintenance medium was added for 24 h, 36 h and 48 h