10.下列何種疫苗對二歲以內幼兒的免疫效果較佳?
(A)23價肺炎鏈球菌疫苗(23-valent vaccine)
(B)7價接合型肺炎鏈球菌疫苗(7-valent conjugated vaccine)
(C)PRP疫苗(polyribosyl-ribitol phosphate vaccine)
(D)A、C、W135等三群腦膜炎雙球菌疫苗
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統計: A(278), B(1423), C(126), D(103), E(0) #1381379
統計: A(278), B(1423), C(126), D(103), E(0) #1381379