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Immunostaining of PEDV antigens using sera from PEDV‐infected pigs. Sera collected on PID 21 from pig 5 (inoculated with Br1/87) (panel a) and from pig 15 (inoculated with the US PEDV) (panel b) and a negative control serum (panel c) were used to detect PEDV antigens produced by infection of Vero cells with the Br1/87 strain of PEDV using immunoperoxidase staining as described in the Methods section.
