In November 2011, Quebec implemented a publicly-funded RV1 vaccination program with its routine administration at 2 and 4 months of age. From February 1, 2012 - May 31, 2014, we conducted prospective, active surveillance for acute rotavirus gastroenteritis at The Montreal Children's Hospital and Centre Hospitalier Universitaire Sainte-Justine, located in Montreal, and Centre Hospitalier Universitaire de Sherbrooke, located in Sherbrooke. Active surveillance was approved by Research Ethics Boards at each hospital.