This article explains how migrant Mexican agricultural workers experience situ - ations of risk that make them structurally vulnerable in the area of health. Although managed systems of migration, such as the c anadian Seasonal Agricul - tural Workers Program ( Programa de Trabajadores Agr ícolas Temporales ) have diverse advantages legal - ity, benefits, formal wages and safer travel conditions it is argued that the controlling nature of these pro - grams also generates vulnerabilities.