What can Reddit, Instagram, and other digital platforms tell us about population health? Dr. Yulin Hswen, associate professor at the University of California San Francisco and associate editor of JAMA and JAMA+ AI, is a computational epidemiologist using big data to understand population health in our increasingly digital world.

In this episode, Salma sits down with Dr. Hswen to explore what our digital environments can tell us about public health. From Reddit threads revealing untold health experiences to phone data mapping mobility patterns during disease outbreaks, Dr. Hswen challenges us to see social media platforms and online data not just as communication tools but as health environments that shape—and sometimes distort—population well-being.

Dr. Hswen shares how a personal healthcare experience first sparked her interest in digital data and reflects on what these traces can reveal about collective behavior, equity, and trust. The conversation dives into the ethics of digital and AI research—issues of privacy, representation, and accountability—and unpacks her proposal of “virtuosity” as the sixth V of big data. Dr. Hswen also discusses her work on ethical guidelines for AI using in public health and clinical medicine and how she approaches her editorial work at JAMA and JAMA+ AI and what excites her about the future of computational epidemiology and the use of AI in clinical and public health research.

Whether you're a researcher considering how to incorporate digital methods and AI into your work or simply curious about what your online activity reveals about population-level health patterns, this episode offers essential perspectives.

Useful resources:

• Hswen Y, Naslund JA, Hurley M, Ragon B, Handley MA, Fang F, et al. AI-Y: An AI Checklist for Population Ethics Across the Global Context. Curr Epidemiol Rep. 2025;12(1):13. doi:10.1007/s40471-025-00362-w

• Kosmyna N, Hauptmann E, Yuan YT, Situ J, Liao XH, Beresnitzky AV, et al. Your Brain on ChatGPT: Accumulation of Cognitive Debt when Using an AI Assistant for Essay Writing Task. arXiv. Preprint posted online June 10, 2025. doi:https://doi.org/10.48550/arXiv.2506.08872

• Roose K. Do Not Disturb: How I Ditched My Phone and Unbroke My Brain. The New York Times. https://www.nytimes.com/2019/02/23/business/cell-phone-addiction.html. February 23, 2019.

• Science & technology. Will AI make you stupid? The Economist. Published online July 16, 2025. https://www.economist.com/science-and-technology/2025/07/16/will-ai-make-you-stupid

• Wesson P, Hswen Y, Valdes G, Stojanovski K, Handley MA. Risks and Opportunities to Ensure Equity in the Application of Big Data Research in Public Health. Annu Rev Public Health. 2022;43(1):59-78. doi:10.1146/annurev-publhealth-051920-110928

• JAMA+ AI Conversations. https://jamanetwork.com/channels/ai/pages/podcast

Host: Dr. Salma Abdalla
Editors: Catalina Melendez Contreras and Zachary Linhares
Marketing: Kinkini Bhaduri
Music: Eden Avery / Melting Glass from Epidemic Sound https://www.epidemicsound.com/track/2fqOXWpHab/