SARS, Ebola, Covid-19… Since the 2000s, we have faced at least one new infectious disease every year, 70% of which are transmitted from animals to humans. Follow Juliette Binoche across 4 continents as she meets with ´disease ecologists´ who study the links between diseases and environmental modifications. To them, this ´pandemics epidemic´ is due to the rapid collapse of biodiversity caused by human activity.