Adenoviruses encode viral proteins which bind to cellular tumor suppressor proteins. Cis acting retroviruses can transform cells in culture. Cis acting retroviruses cannot cause tumors in animals. The Ebola and Marburg viruses are members of the Flaviviridae. Rabies has a very broad host range.
Rabies can occur in a paralytic form.
Rabies is an enveloped virus. The average incubation period for rabies in humans is four days. Rabies can be diagnosed in humans by nuchal biopsy from the nape of the neck. Yellow fever has never occurred in the United States. Yellow fever is a member of the Flaviviridae.