Microbiology General 301c558f Which is enveloped virus - A Dengue virus B Norwalk virus C Hep A virus D Adenovirus High-Yield Explanation Dengue virus (a member of flaviviridae) is an enveloped virus. Adenovirus, norwalk virus (caliciviridae) and hepatitis A virus (Picornaviridae) are non-enveloped viruses.