“Accuracy of the system ends up increasing trust, but it is trust that increases adoptions, which in turn increases accuracy,” Tessaro, a computer scientist at the University of Washington who was involved in creating that state’s forthcoming contact-tracing app, said in a lecture last month.
In other parts of the world, people are taking that necessary leap of faith. Ireland and Switzerland, touting some of the highest uptake rates, report more than 20% of their populations use a contact-tracing app.