Sources: UK's NHS COVID app, downloaded 19M times, had the wrong risk threshold and sent warnings to a "shockingly low" number of users about potential exposure (Sky News)

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Sky News:
Sources: UK's NHS COVID app, downloaded 19M times, had the wrong risk threshold and sent warnings to a “shockingly low” number of users about potential exposure  —  The wrong threshold had reportedly been set for the app and was not recording those who were close enough to transmit the virus.

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