CarlJ
Contributor
Were you at that stop light for more than 5 minutes? If not, then it won't get listed. Individual countries/states may be able to turn the granularity on that down (to, say, 10 or 15 minutes), depending on how they see the results mapping onto reality (e.g. lengthen the time if they get too many false positives).So how does it handle if I am in my car at a stop light and people walk by or cars are next to me? I don't feel like being notified in those cases.
Remember that this isn't necessarily going to catch every case of exposure, and it doesn't have to, in order to achieve the ultimate goal, which is to knock down the R0 number (the average number of additional people infected by each infected person), down below 1.0. Then the virus will die off. And keep in mind they don't want to have it constantly telling everyone to stay home / get tested just because someone walked by their house, outside, 30 feet away. Because that just puts a burden on testing facilities, healthcare facilities, and keeps people out of the workforce (if they can't shift to working from home at the drop of a hat).