As scary and obtrusive as it may sound, Google is able to "track mobility" of it's users: " We aggregated, anonymized data to chart movement trends over time by geography, across different high-level categories of places such as retail and recreation, groceries and pharmacies, parks, transit stations, workplaces, and residential."
Below is Cook County Il's mobility data showing the mobility for various activities as a result of Covid.
When mobility data for restaurants/recreation is compared to cases per million for Cook County and DuPage County IL there is no clear relationship between mobility and cases per million.
It may be that if there was more granular data available such as age, bars versus restaurants, etc., it is possible a more clear relationship might be identifiable. But for now, it is not clear that going to restaurants in a responsible socially distanced manner, led to the recent increase in cases.
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