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Unformatted text preview: RNA genome. This RNA is 5'-capped and 3'-polyadenylated. This group of viruses are called "arboviruses" because their life cycle involves alternating between vertebrates and arthropod vectors, mostly mosquitoes. The Togavirus' natural cycle usually involves birds and mammals and rarely humans with the exception of those responsible for yellow fever and dengue fever. Overall, there are approximately 25 types that are pathogenic for humans....
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- Fall '10