The impossibility problem: When public health policies require what structural conditions prevent

"Bubbles" were introduced as a nonpharmacological strategy in 2020 COVID-19 public health guidelines, comparable to social distancing measures. Despite the seemingly clear metaphor of bubbles, public communication and guidelines for bubbling across Canada and globally created a context of ambiguity, confusion, and inconsistency. It was up to individual citizens, households, groups, schools, and workplaces to know what a bubble was and how to implement bubbling practices. In spite of its widespread adoption as a pandemic intervention, little is known about how the public made sense of this guideline and how they attempted to follow this guideline in practice. Drawing on data from 39 semi-structured qualitative interviews with people in British Columbia Canada, between October and December 2020, this research study explains how people understood and responded to the idea of bubbles. Our findings reveal the role of situated trust and compensatory strategies in shaping bubbling practices in the context of multiple unknowns, as well as the disconnect between how people understood bubbles conceptually versus how they enacted them.