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A
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Possible MERS-CoV transmission scenarios
(A) Self-sustaining transmission in animals, causing spillover infections in people but no self-sustaining human-to-human transmission; control of the animal epidemic might eliminate the virus from human beings in this scenario. (B) Zoonotic exposure triggers a self-sustaining human-to-human epidemic, meaning animal-targeted controls will have only a limited effect on cases in people.
