I am a medical historian and journalist with a long standing interest in the history and science of infectious disease. A regular contributor to The Observer’s Science and Technology section and Guardian Comment-is-free, I am the author of four books, including a global history of malaria and a social history of the 1918-19 influenza pandemic. Prior to becoming a full-time writer, I enjoyed a long career as an investigative journalist and feature writer and have worked for most national newspapers, including the London Evening Standard, Daily Telegraph, Sunday Times, Financial Times and Independent on Sunday. When time allows, I also produce documentaries on medical and health issues. I am currently working on a history of ideas of disease ecology as a Wellcome Research Fellow at Queen Mary University of London.