Coronavirus contact-tracing apps: can they slow the spread of COVID-19?

Coronavirus contact-tracing apps: can they slow the spread of COVID-19?

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“The fundamental thing is, this could all turn out to be garbage. None of it could work.”

Cryptographer Matthew Green says there’s no guarantee that contact-tracing apps will help to curb the spread of coronavirus, especially if uptake is lower than expected. (Nature | 9 min read)