Which of the following hypothetical viruses would likely show a "cactus-shaped" population phylogeny?
A) a mutualistic virus that is vertically transmitted
B) a highly virulent virus, like Ebola, that kills its host before the buildup of any immunity
C) a highly virulent virus that results in lifelong immunity and therefore can only infect individuals that have never encountered any of the virus' strains
D) a virus that can reinfect previously infected hosts via escape mutants
Correct Answer:
Verified
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