I keep hearing this argument, usually as a justification for why some group gathering is fine, or for why this or that should be re-opened.
The problem is that we have to keep making the definition of “here” smaller and smaller. First it is the number of cases in the region, then in the state, then in the county, then in the city or town.
This is how the virus continues to spread. It’s why we are setting new records every day for the number of new infections.