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The effect of luteolin in different viral replication steps. The effects of luteolin on PEDV attachment (A), internalization (B), replication (C), release (D), and inactivation (E) in Vero cells (RT-PCR assay data). Values represent the mean ± standard deviation from three independent experiments. ns: non-significant; *P < 0.05; **P < 0.01; ***P < 0.001
