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Porcine epidemic diarrhea virus (PEDV) isotype-specific antibody (mean ELISA sample-to-positive [S/P] response) by day post-inoculation in serum and oral fluid specimens collected from PEDV-inoculated (•) and negative control (□) groups in study 1: A. serum IgG; B. oral fluid IgG; C. oral fluid IgA.
