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Hemagglutination assays (HA) with the different recombinant VP8* proteins. Human red blood cells of type O, A, and B (marked as O, A, and B), and porcine red blood cells (marked as P) were used. GST-VP8* proteins were serially diluted with PBS and mixed with 0.5% of different types of red blood cells. The PBS buffer without protein was used as negative control (NC).
