This article presents the results of an ethnographic research conducted in the northern border of Mexico from 2019 to 2021, specifically in the city of Tijuana. The objective of this article is to analyse the role of bodies in border and migration management with special emphasis on the time of the Covid-19 pandemic. To do so, I focus on three situations. First is the case of migrants whose bodies are exploited in the precarious work opportunities they find along Mexico's northern border. Second, I look at migrants who experience detention and confinement in Customs and Border Protection (CBP) detention centres in the United States. And third, I analyse the situation of missing migrants whose bodies are sought by family members and numerous collectives in Mexico. Through the analysis of these situations, the article demonstrates that by using 'bodies' as a productive category for analysing migration and the containment of migratory movements, we can understand both the resulting negative effects on migrants' subjectivity and bodies and how migrants respond to and challenge the global migration system.

Keywords: Covid-19; biopolitics; bodies; discipline; migration; necropolitics.

© The Author(s) 2023.

本文介绍了从2019年到2021年在墨西哥北部边境进行的民族志研究结果，特别是位于蒂华纳市的研究。本文旨在分析身体在边境和移民管理中的作用，尤其侧重于新冠疫情期间的情况。为此，我关注了三种情况。首先，是那些在其沿墨西哥北部边境找到的不稳定工作机会中被剥削的移民的身体。其次，我考察了在美国海关与边境保护局（CBP）拘留中心经历拘留和监禁的移民的情况。最后，我分析了失踪移民的情况，这些人的身体被他们的家庭成员以及众多集体在墨西哥搜寻。通过对这三种情况的分析，本文展示了使用“身体”作为研究迁移和限制迁移动态的一个生产性类别，可以帮助我们理解对移民主体性和身体产生的负面影响，同时也能了解移民如何回应并挑战全球移民系统。

关键词：新冠；生物政治学；身体；纪律；移民； necropolitics。