Over sensitivity
Why is there so much of a concern that the app may be too sensitive, and is likely to over estimate the risk of infection from people 2m or more away?
This type of problem is inconvenient, and may lead to people quarantining and or getting tested, and may actually help save lives by alerting an at risk person that they have ben in the vicinity of an infected person.
Failure to detect that the user of the app has been in the vicinity of an infected person is likely to be a fatal error - literally!
Biting the hand that feeds IT
