Frequency of ELISpot Responses Two Weeks after the 2nd MVA Alone or MVA Plus rgp140/GLA-AF Vaccination by First (Group I: 2x 0.1 mL ID [3mg/mL], Group II: 2x 0.1 mL ID + Electroporation [3mg/mL], Group III: 1x 0.1 mL ID + Electroporation [6mg/mL]) and Second (MVA Plus rgp140/GLA-AF or MVA Alone) Randomizations. The gene discussed is GLA; the disease is atrial fibrillation.