This may help... from the Sumter County website...
"
Free COVID-19 Viral Testing Events
The Sumter County Health Department is offering free COVID-19 Testing. For more information on community locations, dates and times, please visit
Events List Page | Florida Department of Health in Sumter or contact the Sumter County Health Department by phone (352-569-3102) or by email (AskSumter@FLHealth.gov)."
Please note that this is not antibody testing.