Spain to roll out Covid-19 app twice as effective as human tracers in pilot
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Spain has decided to roll out a Covid-19 contact-tracing app across the country in September after saying on Monday that a pilot showed it could detect almost twice as many potential infections as human trackers during a simulated outbreak on a tiny island. In the absence of a vaccine or cure, states are deploying Bluetooth wireless technology to log contacts and alert people when someone they have been near tests positive.