Between Sept 21 and Dec 21 , 2010 , 2954 participants were randomly assigned ( 987 assigned to control [ 984 analysed ] , 979 assigned to 4CMenB [ 974 analysed ] , 988 assigned to MenACWY-CRM [ 983 analysed ] ) ; 33 % of the 4CMenB group , 34 % of the MenACWY-CRM group , and 31 % of the control group were positive for meningococcal carriage at study entry .