Zoonosis: how new diseases appear

When a pathogen jumps from an animal to a human, bad things can happen. Zoonosis, the word used to define this unhappy transmission, was a mildly obscure term for most of us until the outbreak of COVID-19. In this 50th edition of Naked Reflections, Chris Smith and Freya Jephcott join Ed Kessler to talk us through the issues...