Harrisburg Medical Center and Southern Illinois Healthcare are proud to partner with the Army National Guard to host a Community Walk-in COVID-19 Vaccination Clinic Wednesday from 9:00 AM – 4:00 PM at Harrisburg Middle School, 312 Bulldog Boulevard in Harrisburg. 300 vaccines will be available. No appointment is necessary. Walk-ins will be accepted. You must be 18 years or older to receive the Johnson and Johnson one dose vaccine.