<prompt> The Norwalk virus is aDNA virusRNA virusPrionBacteriophage induced virus  <response>: Viral gastroenteritis:FamilyVirusViral genomeReoviridaeRotavirusdsRNACalciviridaeNorovirusNorwalk virusSapovirusssRNAAdenoviridaeAdenovirusdsDNAAstroviridaeAstrovirusssRNACoronaviridaeCoronavirusTorovirusssRNAPicornaviridaeAichi virusssRNAPicobirnaviridaePicobirnavirusdsRNAParvoviridaeBocavirusssDNAParamyxoviridaeHendra virusNipah v irusSs-RNARef: Ananthanarayan 9th edition, 562 