<prompt> HDV is -0SS-RNA virusSS_DNA virusDS-RNA virusDS-DNA virus  <response>: HDV is a spherical 36 nm paicle with an outer coat composed of the hepatitis B ssurface antigen surrounding the circular single stranded RNA genome. REF:ANANTHANARAYAN AND PANIKERS TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO-549 