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Author Question: Emerging viruses arise by A) mutation of existing viruses. B) the spread of exis (Read 811 times)

geoffrey

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on: Jul 2, 2013
Emerging viruses arise by
A) mutation of existing viruses.
B) the spread of existing viruses to new host species.
C) the spread of existing viruses more widely within their host species.
D) mutation of existing viruses, the spread of existing viruses to new host species, and the spread of existing viruses more widely within their host species.


ricki

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Reply #1 on: Jul 2, 2013
Hey dude, go with D. I got it right.


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geoffrey

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Reply #2 on: Jul 14, 2013
Thanks sir, correct as always


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