BackgroundThe Canadian National Vaccine Safety (CANVAS) network conducted a multi-center. prospective vaccine safety study to collect safety data after dose 1 and 2 of COVID-19 vaccines and follow up safety information 7 months after dose 1. ObjectiveThis study aimed to describe and evaluate the recruitment methods used by CANVAS and the retention of participants by each modality. Met... https://www.diegojavierfares.com/