42 發展淋病（gonorrhea）疫苗最主要的困難為何？
(A)淋病球菌無法於體外培養
(B)淋病球菌體表成分不具抗原性
(C)淋病球菌無法在人體產生保護性抗體
(D)淋病球菌體表抗原性極易改變代號：1101頁次：8－4

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難度： 簡單

最佳解!
	Chris 大二下 (2018/06/29) Efforts to develop an effective vaccine against gonorrhoea have been unsuccessful despite more than a century of research. Natural infection does not induce protective immunity, with repeated infection common. Challenges for vaccine development include the absence of a correlate of protection, the absence of a.....看完整詳解檢舉

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