Аннотация:This article analyzes the nature and conditions of early industrial work in Chile, and its physical and medical effects on the bodies of workers, within a society which, in the first three decades of the 20th century, accelerated towards urbanization and economic modernization. It proposes that the risk, disease, and vulnerability were the undesirable partners of the new social relationships of production. The criticisms of the working class and the fight for social justice, characteristic of this period, fought these events and were driving factors of the expansion of labor law and the creation of a public health system with a strong social bias.