Flu shot, mist available Published Oct. 19, 2012 28th Bomb Wing Public Affairs ELLSWORTH AIR FORCE BASE, S.D. -- Active-duty Airmen, military dependents, civilian employees, retirees and contractors can now receive a flu shot or flu mist at the 28th Medical Operations Squadron Immunization Clinic. Flu shots or mists are given on a walk-in basis from 7:30 a.m. to 12:15 p.m., and 1 to 4:30 p.m., Monday through Friday. For more information, call the 28th MDG Immunization Clinic at (605) 385-3365.