Dr David Ogilvie, Programme Leader and MRC Investigator in the Population Health Interventions group, talks to Oliver Francis. They discuss how we evaluate complex interventions and phenomena; how we put together the findings of multiple studies in a meaningful way; and what we do with all this evidence if we want to improve public health. David reflects on his career studying physical activity, health and the built environment; what we can learn from the Covid pandemic; and Sherlock Holmes.

You can find links to papers and resources referenced in the conversation at https://www.mrc-epid.cam.ac.uk/news/podcast/david-ogilvie-podcast-links/