[Answer] Which of the following statements best reflects what we know about how the flu virus moves between species?A) The flu virus in a pig is mutated and replicated in alternate arrangements so that humans who eat the pig products can be infected.B) A flu virus from a human epidemic or pandemic infects birds; the birds replicate the virus differently and then pass it back to humans.C) An influenza virus gains new sequences of DNA from another virus such as a herpesvirus; this enables it to be transmitted to a human host.D) An animal such as a pig is infected with more than one virus genetic recombination occurs the new virus mutates the virus is passed to a new species such as a bird and the virus mutates again and can now be transmitted to humans.

Answer: B
Which of the following statements best reflects what we know about how the flu virus moves between species?A) The flu virus in a pig is mutated and replicated in alternate arrangements so that humans who eat the pig products can be infected.B) A flu virus from a human epidemic or pandemic infects birds; the birds replicate the virus differently and then pass it back to humans.C) …

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