Posted at least once already and it was not worth reading the freakin first time.
Only contact tracing could prove or disprove this thesis. They used 18 counties......but how many counties did Trump have rallies in....far more. So they cherry picked the data.
Take my county, Erie, PA. Most of the cases are in Erie proper. Few folks in Erie attended the rally vs those of us who live in the rural areas. ( Erie County gets real rural, real fast. ) There would also have been a large contingent of folks from NE Ohio there and Western NY.