Covid-19: NHS app has told 1.7 million to self-isolate
Ministers believe the contact-tracing app has prevented 600,000 cases of the disease in England and Wales. …
Baroness Dido Harding, executive chair of the NHS Test and Trace programme, had been under pressure to release the figures for months, and the BBC unsuccessfully attempted to obtain some of the figures via a Freedom of Information request in November.
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