The MVA-H5-sfMR vaccine at 10 ( 8 ) pfu induced significantly higher antibody responses after one and two immunisations than did 10 ( 7 ) pfu when assessed with haemagglutination inhibition geometric mean titre at 8 weeks against H5N1 A/Vietnam/1194 / 2004 ( 302 [ SD 38 ] vs 92 [ 23 ] and 1081 [ 24 ] vs 158 [ 32 ] ) .