Patients in the in-person arm experienced coverage changes that exceeded those in the control arm for Tdap ( 3.4 % [ 95 % confidence interval ( CI ) : 2.2 to 4.6 ] ) , meningococcal ( 4.7 % [ 95 % CI : 2.3 to 7.2 ] , and HPV ( 1.5 % [ 95 % CI : 0.3 to 2.7 ] ) vaccines .