The MVA-H@-sfMR vaccine at @ ( @ ) pfu induced significantly higher antibody responses after one and two immunisations than did @ ( @ ) pfu when assessed with haemagglutination inhibition geometric mean titre at @ weeks against H@N@ A/Vietnam/@ / @ ( @ -LSB- SD @ -RSB- vs @ -LSB- @ -RSB- and @ -LSB- @ -RSB- vs @ -LSB- @ -RSB- ) .