Comet Bus System offering Free COVID-19 Vaccine at Transit Hub The Central Midlands Regional Transit Authority, is partnering with Health Force, LLC, to offer free COVID-19 vaccinations May 3, 2021 12:40 PM EDT COLUMBIA, SC (WOLO)– The Comet Bus system, Central Midlands Regional Transit Authority, is partnering with Health Force, LLC, to offer free COVID-19 vaccinations. You can get a shot at the COMET Central transit hub, which is located on the corner of Laurel and Sumter Streets. Hours of Operation Sundays: 10:00 a.m. – 2:00 p.m. Officials say you have a choice to get either the Johnson &Johnson vaccine or the Moderna vaccine.