Contact-Tracing Apps Must Respect Privacy, Scientists Warn

Trust Hinges on Transparency, 200 Top Scientists and Researchers Say in Open Letter
All contact-tracing apps for combating COVID-19 must be developed in an open and transparent manner, remain voluntary, be based on Bluetooth, and allow users to opt in, or else they risk making the global pandemic even worse, 200 of the world's leading scientists and researchers have warned.