The UK has announced they will be using Apple's contact tracking technology to trace COVID-19 infection. On a side note 60% of the sailers on the CVS Theodore Roosevelt who tested positive for COVID-19 were asymptomatic, which brings Arties' point about testing back into focus. Until there is a high level of testing of everyone we will not have a clear picture of how widespread the COVID-19 infection is and at this point not all of those who have symptoms have access to testing much less those who are asymptomatic. The epidemiologists are at best making semi-informed guesses.
