COVID-19: Is data privacy the cost of public health? 04/24/20 – BOSTON, M.A. – Contact tracing stock on April 24, 2020. Photo by Ruby Wallau/Northeastern University Contact-tracing apps that use Bluetooth to track interactions between people in close proximity could slow the spread of the coronavirus. But are people willing to forfeit their privacy for the sake of public health? “We can have both,” says Christo Wilson, who studies computer privacy and security. The question is: Will we? In this episode, we talk to Christo Wilson (associate professor of computer science).