From 3 months after dose two , 4CMenB vaccination resulted in significantly lower carriage of any meningococcal strain ( 182 % [ 95 % CI 34-308 ] carriage reduction ) , capsular groups BCWY ( 266 % [ 105-399 ] carriage reduction ) , capsular groups CWY ( 296 % [ 81-460 ] carriage reduction ) , and serogroups CWY ( 285 % [ 28-475 ] carriage reduction ) compared with control vaccination .