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Inhibitory effect of EBL on hemagglutination by IAV infection. (A,B) EBL at concentrations of 10, 100, 200, or 400 μg/ml or medium was mixed with H1N1 IAV for 1 h at 4°C. The mixture was used to cotreat onto the RAW 264.7 cells. At 24 h post incubation, the supernatants of cells were serially diluted and mixed with RBC cells to examine the effect of EBL on hemagglutination by IAV infection.
