Mobile phone applications that trace the new coronavirus could help decide whether business travelers and vacation-goers get to meet clients or visit their favorite beaches this summer. But politics and disagreement over what system to use threatens to thwart that solution.
Governments in Europe and elsewhere are turning to voluntary mobile apps to help trace possible infections of the coronavirus, a tool that will help track and contain what they expect to be resurgent outbreaks of the virus once lockdown measures lift and people start to fly internationally.
