This book examines how the Covid-19 pandemic can be described as a biopolitical crisis, taking into account a fact often overlooked by commentators: Covid-19 is a zoonosis, i.e. a disease transmissible between animal species. The Sars-Cov2 virus causing this respiratory disease circulated in bats before passing to humans under as yet mysterious conditions, and it was transmitted from humans to other species, notably mink and deer.