30. Which of the following series best reflects what we know about how the flu virus moves between species?
(A) An avian flu virus undergoes several mutations and rearrangements such that it is able to be transmitted to other birds and then to humans.
(B) The flu virus in a pig is mutated and replicated in alternate arrangements so that humans who eat the pig products can be infected.
(C) A flu virus from a human epidemic or pandemic infects birds; the birds replicate the virus differently and then pass it back to humans.
(D) An animal such as a pig is infected with more than one virus, genetic recombination occurs, the new virus mutates and is passed to a new species such as a bird, the virus mutates and can be transmitted to humans.

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統計： A(54), B(13), C(12), D(203), E(0) #921495

詳解 (共 2 筆)

#3736431
流感病毒是因為豬本身感染了多種病毒而病毒...
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#6307068
Flu virus 流感病毒
Mutations 突變
Rearrangements 重組：指基因片段的重新排列。
Transmitted 傳播：病毒從一個宿主傳遞到另一個宿主的過程。
Genetic recombination 基因重組
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