A small county in Tennessee for much of the past year has reported the highest COVID-19 vaccination rate in Tennessee and one of the highest in the South. If only it were true. The rate in Meigs County was artificially inflated by a data error that distorted most of Tennessee’s county-level vaccination rates by attributing tens of thousands of doses to the wrong counties, according to a KHN review of Tennessee’s vaccination data. When the Tennessee Department of Health quietly corrected the error last month, county rates shifted overnight, and Meigs County’s rate of fully vaccinated people dropped from 65% to 43%, which is below the state average and middling in the rural South.