Credit: CC0 Public Domain

Public health officials are scrambling to rapidly ramp up contact tracing, which involves tracking down people who may have come in contact with someone who has a contagious disease.

Google and Apple are looking to take advantage of the location devices we all carry—our phones. But that method comes with concerns about privacy and , says Woodrow Hartzog, professor of law and computer science at Northeastern.

Credit: Northeastern University