单项选择题
A.62%B.72%C.82%D.92%
A.三剂次,0,3,21天各一粒B.三剂次,0,7,28天各一粒C.三剂次,0,9,21天各一粒D.三剂次,0,9,28天各一粒
A.亚单位疫苗B.减毒活疫苗C.多糖疫苗D.基因重组+细菌灭活疫苗