The helical nucleocapsid has a virus specific rNA polymerase (transcriptase) associated with it. They are enveloped viruses: main members are newcastle disease virus, measles virus and the parainfluenza viruses.
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I think that you have to realize that the Mumps causing virus is only one of the paramyxovirus (or more correctly: belonging to the paramyxoviridae family of virus). The virus causing Mumps is specific to human, but in the paramyxovirus family, other member infect other vertebrates. For ...
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