Hi Michael! As Kevin noted, our team analyzed the only counties that the CDC had released data for as of May 20 (when this piece was published). The CDC only includes counties where at least 10 COVID-19 deaths have been reported at the time of analysis; since our piece was published, another ~100 counties or so have been added to the database: http://data.cdc.gov/NCHS/Provisional-COVID-19-Death-Counts-in-the-United-St/kn79-hsxy. We will be updating this regularly to reflect new data as it's available.