O R I G I N A L A R T I C L E Herd-level prevalence and incidence of porcine epidemic diarrhoea virus (PEDV) and porcine deltacoronavirus (PDCoV) in swine herds in Ontario, Canada T. Ajayi1 | R. Dara2 | M. Misener3 | T. Pasma4 | L. Moser5 | Z. Poljak1 1Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada 2School of Computer Science, University of Guelph, Guelph, ON, Canada 3Ontario Swine Health Advisory Board (OSHAB), Stratford, ON, Canada 4Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA), Guelph, ON, Canada 5Swine Health Ontario, Guelph, ON, Canada Correspondence Z. Poljak, Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada. Email: