Ferret Interleukin-1 Alpha (IL-1α) is a pro-inflammatory cytokine belonging to the IL-1 family—which includes IL-1α, IL-1β, and the IL-1 receptor antagonist (IL-1Ra)—and plays a key role in initiating early innate immune responses in ferrets (Mustela putorius furo). IL-1α is constitutively expressed in epithelial and barrier tissues and functions as an intracellular alarmin that is rapidly released upon cell injury, necrosis, or viral infection, triggering immediate inflammatory signaling. Upon binding to the IL-1 receptor type 1 (IL-1R1), IL-1α activates NF-κB and MAPK pathways that promote leukocyte recruitment, vascular activation, fever, and amplification of downstream cytokine cascades. In ferret health and research, IL-1α is particularly relevant in respiratory viral infection models such as influenza virus and SARS-CoV-2, where epithelial cell damage leads to IL-1α release and contributes to early lung inflammation and immune cell infiltration. While critical for initiating antiviral defense, excessive IL-1α signaling may exacerbate pulmonary pathology and cytokine-mediated tissue injury. As an early mediator of sterile and infectious inflammation, ferret IL-1α serves as a biomarker of epithelial damage and innate immune activation. Given the ferret’s widespread use as a translational model for human respiratory disease and viral transmission studies, characterization of IL-1α supports investigations into cytokine-driven lung inflammation, host–pathogen interactions, and development of targeted anti-inflammatory or immunomodulatory therapies relevant to human respiratory immunology.