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With the spread of covid-19 there has been a global effort to develop systems and technologies capable of tracking and tracing, identifying and notifying individuals who have been in contact with a carrier. Many apps have been developed rapidly to meet the demand, and opinions differ widely on their effectiveness and usefulness.
MIT Technology Review have produced a database, the Covid Tracing Tracker, to capture details of every significant automated contact tracing effort around the world. To date they have documented 25 individual, significant automated contact tracing efforts globally, which includes details on what they are, how they work, and what policies and processes have been put in place around them.
To read more about the database access the original article here