The facts on COVID-19 contact tracing apps, and benefits of returning sea otters to the wild
http://www.sciencemag.org/podcast/facts-covid-19-contact-tracing-apps-and-benefits-returning-sea-otters-wild
Staff Writer Kelly Servick joins host Sarah Crespi to talk about the ins and outs of coronavirus contact tracing apps—what they do, how they work, and how to calculate whether they are crushing the curve.
Read all our coronavirus coverage.