An excellent source of Covid related data can be found at covidtracking.com. I wouldn't be surprised if you could find what you are looking for there. You can also download complete datasets from covidtracking.com/data/api.
They have been gathering data since the beginning in the US. Every day, 7 days a week, dozens of volunteers scour dept. of health ...
https://hifld-geoplatform.opendata.arcgis.com/datasets/2a9677db741d4a78bd221586fe9a61f5_0/data appears to have this data as KMLs, Shapefiles, etc
https://www.fgdl.org/metadata/metadata_archive/fgdl_html/rails_2015.htm explains the various fields.
I was just helping someone find data on delinquencies so I thought I'd add an update. The Consumer Financial Protection Bureau publishes mortgage delinquency rates for states, metro areas, and the 400 to 500 largest counties in the US:
This data is sourced from the ...
BEA: GDP by County, Metro, and Other Areas
The Bureau of Economic Analysis released the first official GDP estimates for the county level in December 2019:¹