試題詳解

9. Which of the following is the most probable fate of a newly emerging virus that causes high mortality in its host?
(A) The newly emerging virus will die out rather quickly or will mutate to be far less lethal.
(B) It is able to spread to a large number of new hosts quickly because the new hosts have no immunological memory of them.
(C) The new virus rep licates quickly and undergoes rapid adaptation to a series of divergent hosts.
(D) A change in environmental conditions such as weather patterns quickly forces the new virus to invade new areas.