A peer-reviewed study finds UK's NHS contact-tracing app reduced the second wave by roughly 25%, averting ~594,000 out of 1.89M cases from October-December 2020 (BBC)

BBC:
A peer-reviewed study finds UK's NHS contact-tracing app reduced the second wave by roughly 25%, averting ~594,000 out of 1.89M cases from October-December 2020  —  The NHS contact-tracing app had a significant impact on lowering the spread of the coronavirus in the UK, a peer-reviewed paper has found.

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