Michael Bresalier (Swansea University) discusses his work on the modern flu with Merle and Lee. Michael begins with talking about influenza in general and how the virus is constantly changing. The conversation then moves to focus on the annual flu shot - including its composition and how it is  manufactured. Michael answers questions about a few other topics - including the impact of the 1918 pandemic on the knowledge of the flu in medical thinking, and the classic story of how the flu virus was discovered - where he highlights the invisible institutional framework that enabled the discovery to happen. The interview concludes with a reflection on the work needed to control a disease and the necessary multi-species approach required to do so.