Skip to main content
. 2021 Dec 25;38(4):453–455. doi: 10.5511/plantbiotechnology.21.0925a

Figure 2. Inactivation of influenza A virus by different concentrations of proanthocyanidins (PACs) from Alpinia zerumbet, apple, and green tea after 30 min. PACs were mixed with or without influenza A H1N1 virus (A/PR/8/34) and added to MDCK cells. After incubation for 4–7 days, a cytopathic effect was observed under an inverted microscope. The 50% endpoint dilution (TCID50/ml) was calculated using the Reed and Muench (1938) method.

Figure 2. Inactivation of influenza A virus by different concentrations of proanthocyanidins (PACs) from Alpinia zerumbet, apple, and green tea after 30 min. PACs were mixed with or without influenza A H1N1 virus (A/PR/8/34) and added to MDCK cells. After incubation for 4–7 days, a cytopathic effect was observed under an inverted microscope. The 50% endpoint dilution (TCID50/ml) was calculated using the Reed and Muench (1938) method.