The COVID-19 pandemic has profoundly impacted the production and circulation of scientific knowledge, both within the scientific community and in its broader interactions with society. This paper examines the role of emotions in the context of the health crisis, uncertainty, and urgent decision-making. Specifically, it explores how key figures—frontline healthcare workers, institutional experts, and lab scientists—conveyed emotions while simultaneously engaging in knowledge production and circulation. By drawing on Sara Ahmed’s framework on the "stickiness" of emotions and applying an intersectional analysis, the study investigates how emotions became attached to specific bodies of knowledge and practices. We argue that the communication of emotions during times of crisis was not only articulated through direct expression but also through moments of silence, with these emotional dynamics shaping the circulation and organization of knowledge. Additionally, we highlight how (gendered) power hierarchies influenced these emotional exchanges within expert communities during the pandemic.