Pushing the limits of bio-surveillance Use of high-tech surveillance is on the rise: in a moment when controlling the spread of COVID-19 is paramount, a global regime of technologically enabled exclusion has been bolstered. But what might be the long-term implications of accepting being tracked before we even move? ‘Draw me a border, if you please’. What image comes to mind? Most of us might think of walls or barbed wire fences planted firmly on frontier locations. From the Great Wall of China to the Berlin Wall, fortified barriers have long served as symbols of sovereign control. Today, however, a new trend has emerged: the growth of invisible borders. These are borders that rely on sophisticated legal techniques to detach