To stop the spread of the coronavirus, researchers at the Massachusetts Institute of Technology are now trying to use location-tracking technology to stop the spread of the coronavirus. Our reporter Doug Belkin joins us to explain what they're working on - and what challenges they'll face. Plus, Senior Personal Tech Columnist Joanna Stern stops by with her work-from-home tech tip of the day. Have a question for Joanna, or want to share your own experience? Leave her a message at (314) 635-0388 or email her at joanna.stern@wsj.com. You may be featured on one of our podcasts. Kateri Jochum hosts. Learn more about your ad choices. Visit megaphone.fm/adchoices