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 hostspecies
D) all of the above

Question

Quizplus · Accepted Answer

Emerging viruses can arise through 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.

Emerging Viruses Arise by ________