Migrant agricultural workers come to Canada annually to help farmers with planting, harvesting, and processing foods. Clusters of community-acquired COVID-19 among migrant agricultural workers in Ontario during the 2020 growing season signify that migrant agricultural workers are vulnerable to infectious disease outbreaks such as COVID-19. This does not mean that the men and women who come to Canada to work are inherently at increased risk for COVID-19 or other infectious diseases. It is instead their circumstances in Canada, including their legal status and their social determinants of health, including working conditions, housing provided, and inequities in obtaining appropriate health care, that create situations of increased vulnerability.