The vaccination rate was higher in the intervention group compared to the control group ( 57 % vs 48 % ; relative risk = 1.20 , 95 % CI = 1.06-1 .37 ) , but the two groups did not differ significantly in their awareness of the vaccination at 3-month follow up ( 65 % vs 59 % , relative risk = 0.86 , 95 % CI = 0.69-1 .07 ) .