![](https://wp.doc.ic.ac.uk/apss/wp-content/uploads/sites/138/2020/04/TrustLevelsAndroid.001.jpeg)
A number of contact tracing mobile apps have already been proposed [1, 2, 3] and the NHS in the UK is preparing to launch its own version [4]. More recently an unprecedented coalition between Apple and Google (who together enjoy more than 98% of the mobile OS market share) proposed changes in their mobile operating… Read more »
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