North Dakota, Wyoming and Alabama are the latest US states launching apps to warn users about potential exposure to the novel coronavirus by tracking their encounters, representatives for the states told Reuters on Thursday.
Virginia last week became the first US state to urge residents to download such an app using technology developed by smartphone software giants Apple Inc and Alphabet Inc’s Google.
About 316 000 people have downloaded Virginia’s app, COVIDWISE, Jeff Stover, a state health department official, told Reuters during an online event hosted by the Responsible Data Foundation as part of a series on pandemic-related technology.
Alabama, which has been testing its app among some university students and staff, plans to begin marketing it statewide on Monday, said Sue Feldman, director of graduate programs in health informatics at University of Alabama at Birmingham.
Washington, which recently tested its app at a hospital, and Pennsylvania are among other states that could formally launch apps in the coming weeks with the Apple-Google technology.
But developers acknowledge that they still face challenges in convincing users that the tracking and notification systems are private and reliable.
For instance, getting contact tracing apps from different states to communicate with each other, as users cross borders, is untested with North Dakota’s app now the first and only in the U.S. to support that functionality.
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