I think the most important inference from the data is not necessarily the SSE's themselves, but the type of economic and social interactions that make SSE's an important vector in the spread. These are spaces where people are going to forced in close proximity for a decent amount of time. As we approach Easter it might allow the sitting President to prescribe a policy of something like the following:
Businesses and Government Buildings
Indoor business must establish separate entry and exit pathways that maintain 6 ft spacing
Indoor business must maintain a ratio of less than 1 person per 110 sqft
Outdoor business must maintain 6 ft spacing
Customers in Retail and Commercial business should wear a non-surgical mask
Theaters and stadiums to remain closed until further notice
Service providers will adhere to indoor and outdoor business requirements
Hospitals, clinics, nursing homes, long-term care
Continue to operate as prescribed
Public Transportation
Non-surgical masks to be required on all flights, buses and trains
TSA will screen all passengers for elevated temperature during security screenings
v/r