辉瑞：辉瑞-BioNTech新冠疫苗对6个月至4岁的儿童的有效性为73.2%

array(1) { [429426]=> array(2) { [2]=> array(2) { [0]=> string(6) "疫苗" [1]=> string(6) "辉瑞" } [4]=> array(1) { [0]=> string(19) "同花顺7x24快讯" } } }