Germany's federal agency responsible for disease control and prevention, the Robert Koch Institute, has teamed up with the health technology start-up Thryve to develop an app called Corona-Datenspende ("data donation") that works with a variety of smartwatches and fitness wristbands. The app is designed to use the device's sensors to collect user data, and includes algorithms to it to spot symptoms linked to COVID-19 and help predict the spread and containment of the virus. More than 50,000…