The UK is starting a trial of a tracing app it hopes will be a key part of its future strategy against coronavirus.
Council and healthcare workers on the Isle of Wight, off the south coast of England, are the first to try the app.
It'll be rolled out to the rest of the island later in the week, and could be available across the UK in weeks.
The government insists privacy concerns have been addressed.
Isle of Wight reporter Nick Codling explains how the app works.
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