17. Viruses
Viruses
Multiple Choice
Multiple ChoiceEmerging viruses can originate from which of the following sources?
A
Animal viruses
B
The mutation of existing human viruses
C
Viruses previously confined to small, isolated populations that can now spread due to technological or social changes such as the development of affordable international travel
D
None of the listed responses is correct.
E
All of the listed responses are correct.
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