Figure 7.

The effects of PACs and TAs in tea extracts on protecting cells from SARS-CoV-2 and its variants infection were determined by the Vpp assay. (A) Sun-Link-Sea High-Mountain tea (T1) and (B) Oriental Beauty tea (T8) (used as the positive control) were extracted by ethyl acetate (EA) to remove their tannins (EA extraction group), and then supplemented with equal amounts of PACs and TAs (Tannins spiked group). The untreated group served as normalized control and its infection rate was set as 100%.