How does the new vaccine work?A.By activating an immune response.B.By selecting one or two
专四
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How does the new vaccine work?
A.By activating an immune response.
B.By selecting one or two genes.
C.By awaking the entire parasite.
D.By deactivating the entire parasite.
请帮忙给出正确答案和分析,谢谢!
