“…Worry about vaccine safety and its potential adverse effect [ 56 , 59 , 64 , 65 , 67 , 70 , 72 , 76 , 77 , 81 , 85 , 86 , 90 , 91 , 92 , 94 , 95 , 98 , 101 , 103 , 105 , 112 , 115 , 116 , 118 , 121 , 126 , 127 , 128 , 131 , 132 , 133 , 140 , 142 ], novelty of vaccine and its’ short development time [ 57 , 101 , 116 ], and hesitancy regarding vaccine’s efficacy and benefits [ 56 , 59 , 66 , 70 , 71 , 72 , 74 , 76 , 92 , 94 , 101 , 105 , 115 , 117 , …”