During the COVID-19 pandemic, national risk management scenarios took an unexpected course at different individual and collective scales. In France, in the field of occupational risk, long-established practices, rules, and categories have been disturbed and placed ‘under stress’. The field of prevention of occupational risk, which has constituted a distinct field in health policies, with its own bodies, missions and approaches, was similarly disturbed. To describe and analyse these social phenomena, we propose using two complementary concepts: the British ‘risk work’ and the French ‘prevention work’ [‘travail de prévention’]. We show some of the empirical manifestations of risk work associated with prevention work and their effects on the boundaries instituted in the field of prevention at work. Our investigation used data from documentation and interviews in order to explore the experiences of two categories of professionals – physicians specialising in occupational health and home care aides – concerned with prevention during an acute phase of the pandemic. We point out that the question of protective means and equipment has been a central issue, in a context characterised by tensions between knowledge and available material resources. We also show that contradictions and points of tension between actors reveal the subjects under discussion and the more or less porous nature of the boundaries. Amid these processes, however, the principles underlying occupational health were reaffirmed, along with the need for a cooperation between workers and prevention professionals.

在 COVID-19 大流行期间，国家风险管理情景在不同的个人和集体规模上发生了意想不到的过程。在法国，在职业风险领域，长期确立的做法、规则和类别受到干扰并处于“压力之下”。职业风险预防领域构成了卫生政策的一个独特领域，拥有自己的机构、使命和方法，也同样受到干扰。为了描述和分析这些社会现象，我们建议使用两个互补的概念：英国的“风险工作”和法国的“预防工作”[' travail de prévention']。我们展示了与预防工作相关的风险工作的一些经验表现及其对工作中预防领域所设立的界限的影响。我们的调查使用了来自文件和访谈的数据，以探讨两类专业人士——专业从事职业健康的医生和家庭护理助理——在大流行的急性阶段关注预防的经验。我们指出，在知识与可用物质资源之间存在紧张关系的背景下，防护手段和设备问题一直是一个核心问题。我们还表明，参与者之间的矛盾和紧张点揭示了正在讨论的主题以及边界或多或少的多孔性。然而，在这些过程中，