Margaret Mary McCartney is a general practitioner, freelance writer and broadcaster based in Glasgow, Scotland. McCartney is a vocal advocate for evidence-based medicine. McCartney was a regular columnist at the British Medical Journal. She regularly writes articles for The Guardian and currently contributes to the BBC Radio 4 programme, Inside Health. She has written three popular science books, The Patient Paradox, The State of Medicine and Living with Dying. During the COVID-19 pandemic, McCartney contributed content to academic journals and broadcasting platforms, personal blog, and social media to inform the public and dispel myths about coronavirus disease.