Seminole County opens first vaccine site for elderly residents at Oviedo Mall Appointments already filled up this week; Seminole website experiencing outage Updated: Tags: SEMINOLE COUNTY, Fla. – Seminole County was one of eight counties in the state selected for a pilot program that has workers distributing the Moderna COVID-19 vaccine at the Oviedo Mall this week. Seminole County’s Emergency Manager Alan Harris said he had been talking about this program for about six months and said he was very vocal with the state leaders and told them he’d like to be a part of the pilot program. Other counties in Florida that are part of the program will also begin administering shots very soon, Harris said, including neighboring Orange County.