63有關腦膜炎雙球菌(Neisseriameningitidis),下列何種血清型目前尚無有效的疫苗?
(A)serogroupA
(B)serogroupB
(C)serogroupC
(D)serogroupY
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統計: A(0), B(12), C(3), D(2), E(0) #2978539
統計: A(0), B(12), C(3), D(2), E(0) #2978539