How governments are using apps and citizens' phone data to try to contain the pandemic. Plus, the robots helping to disinfect hospital wards using ultraviolet light. And Steven Levy, author of the new book "Facebook - the inside story" talks to us about Mark Zuckerberg's management of the social network. Presented by Rory Cellan-Jones, with BBC tech reporter Jane Wakefield, and special guest Ingrid Lunden from TechCrunch. Produced by Jat Gill.(Image: A man wearing a facemask to protect against the COVID-19 coronavirus browses his smartphone on a Beijing street as he rides a shared bicycle. Credit: NICOLAS ASFOURI/ AFP via Getty Images).

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