Alina Chan is a molecular biologist, scientific advisor at the Broad Institute of MIT and Harvard, and the co-author of Viral: The Search for the Origin of Covid-19. In this episode, Chan says that more than three years after the start of the pandemic, there still has been “no credible investigation” of the origins of Covid, the continuing resistance among some scientists for a full investigation, the key role that Twitter has played in the investigation, and her views on the wet market,  lockdowns, masks, and Anthony Fauci, and why she’s still pushing for a full investigation. (Recorded April 3, 2023.)