“…All studies reported immunogenicity as their primary outcome; 29 studies reported safety as secondary outcome [ 17 , 93 , 94 , [96] , [97] , [98] , [99] , [100] , [101] , [102] , [103] , [104] , [105] , [106] , [107] , 109 , 110 , 114 , 115 , 118 , 119 , 121 , [123] , [124] , [125] , [126] , 128 , 129 , 131 ], and two studies [ 96 , 105 ] mentioned costs. The majority of studies (n = 38) reported seroprotection rates ( Table 1 ) [ 17 , [90] , [91] , [92] , [93] , [94] , [95] , [96] , [97] , [98] , [99] , [100] , [101] , [103] , [104] , [105] , [106] , [107] , [108] , [109] , [110] , [111] , [112] , [113] , [114] , [115] , [116] , [117] , [118] , [120] , …”